13 best deck sealers

Deck sealers are essential products used in the realm of painting and home improvement, specifically for outdoor projects involving wooden decks and surfaces. These sealers play a crucial role in protecting and enhancing the durability of wood, ensuring it can withstand various weather conditions and the test of time. Here's what you need to know about deck sealers:

  1. Purpose: Deck sealers are designed to protect outdoor wooden surfaces, such as decks, fences, and outdoor furniture, from moisture, UV rays, mildew, and other environmental factors. They form a protective barrier that prevents water penetration and helps maintain the wood's natural appearance.

  2. Types: There are different types of deck sealers available, including clear sealers, semi-transparent sealers, and solid-color sealers. Each type offers varying levels of protection and appearance options. Clear sealers provide minimal change to the wood's color, while solid-color sealers offer complete coverage and can change the wood's appearance significantly.

  3. Water-Based vs. Oil-Based: Deck sealers come in both water-based and oil-based formulations. Water-based sealers are generally easier to clean up, have a lower odor, and dry faster. Oil-based sealers tend to penetrate deeper into the wood and provide a longer-lasting protective coat but may require more drying time and have a stronger odor.

  4. Preparation: Before applying a deck sealer, it's crucial to prepare the surface properly. This typically involves cleaning the deck, removing any old sealers or stains, and allowing the wood to dry thoroughly.Proper preparation ensures better adhesion and longevity of the sealer.

  5. Application: Deck sealers can be applied using various methods, including paint brushes, paint rollers, and sprayers. Paint brushes are a common choice for precision work, such as edges and corners, where control is essential. Rollers and sprayers are more suitable for larger areas and can provide a more even coat.

  6. Maintenance: To keep your deck looking its best and maintain the protective barrier, periodic maintenance is necessary. This may involve cleaning the deck and reapplying the sealer every 1-3 years, depending on the sealer type and environmental conditions.

  7. Benefits: Deck sealers offer several advantages, including protection against moisture, preventing rot and decay, UV protection to prevent fading, and enhancing the wood's natural beauty. They also make the surface easier to clean and maintain.

  8. Considerations: When choosing a deck sealer, consider factors such as the wood type, climate, and desired appearance. Some sealers are better suited for certain wood species or climates, so it's essential to select the right product for your specific needs.

In summary, deck sealers are valuable tools in the realm of painting and home improvement, particularly for maintaining and protecting outdoor wooden surfaces like decks. Choosing the right sealer and applying it correctly can significantly extend the life of your wood while keeping it looking its best.

Below you can find our editor's choice of the best deck sealers on the market
  

Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Stain and Sealer for Wood

Ready Seal

Based on 3 reviews Check latest price

Product description

Ready Seal stain enhances the natural beauty of the wood allowing the texture and grain of the wood to remain visible. This stain is an oil-based, semi transparent stain and sealer in one, suitable for all your exterior wood projects. It is a unique formula that penetrates deeply to protect and preserve wood from the elements such as mold, mildew and damaging UV rays.

From the Manufacturer

Ready Seal stain enhances the natural beauty of the wood allowing the texture and grain of the wood to remain visible. This stain is an oil-based, semi transparent stain and sealer in one, suitable for all your exterior wood projects. It is a unique formula that penetrates deeply to protect and preserve wood from the elements such as mold, mildew and damaging UV rays.

  • Requires no primer. Ready Seal is darkest when first applied. It reaches its true color in approximately 14 days. Do not apply Ready Seal over painted or newly stained surfaces. Sealed surfaces inhibit penetration.
  • May be applied using sprayer, roller or brush onto the woods surface.
  • Requires no back brushing and will nerver leave runs, laps, or streaks.
  • Requires no wet-line application, the product will blend itself and can be applied in any temperature range for proper application.
  • Requires no diluting or thinning prior to spray applications.
  • Subject to or will include a PaintCare recycling fee in the following states: CT, or VT. Not available in CA.
  • Easy maintenance - no sanding or stripping required for re-application

User questions & answers

Question: What is the warranty on this
Answer: I don't believe there is any warranty. We applied it two years ago and the covered areas still look good. The section in direct Sun...needs to have it applied again.
Question: How long can the product be stored once the container is opened
Answer: We actually used some that we had stored in our garage that was left over from the last time we stained our siding and that was in the summer of 2012, 6 yrs ago. When we removed the lid, it looked like it had become a gel but my husband used a drill with a paint mixer/stirrer tool and it became liquefied again. We applied it to the siding without incident and the color matched the new 5 gallon containers we bought this summer .
Question: I have 275 ft of fence plus a gate- what's the coverage with using a sprayer
Answer: I’m in the process of staining my fence (I am using a different brand) with a semi-transparent stain. I have 187’ of fence at 5’ high including 2 gates. Applied with a roller and brush, I’m going to need around 13 gallons. My recommendation is rent a sprayer from Home Depot. You’ll save time and money as you’ll use less product and it will go much much faster.
Question: we have a heavy dining set and i am worried about scratches after i stain, how does it hold up to heavy chairs moving back and forth
Answer: I have a deck/patio furniture set, including a cast iron umbrella base. Lots of use over the last year with no evidence of scratches in the deck. The stain penetrates the wood rather than building a barrier so dragging stuff across the boards won't take it off provided the wood is properly prepared.

Product features

Application

1. Use a brush, roller or sprayer to apply Ready Seal.

2. Blend multiple containers together to ensure color consistency.

3. Apply two light coats to wood surface and allow at least 45 minutes between.

4. Allow 48 to 72 hours of drying. Drying time will vary depending on temperature, humidity and surface porosity.

-Ready Seal contains no linseed oil and will not stain hands.

-Ready Seal is biodegradable when in contact with soil and water.

-Meets current VOC level requirements throughout the United States.

THOMPSONS WATERSEAL 21802 VOC Wood Protector, 1.2-Gallon

Thompson's Water Seal

Based on 464 reviews Check latest price

Product description

1. 2 gallon, VOC clear wood protector, VOC Compliant, bonus container, for members in VOC restricted areas.

  • Item Weight: 9.65 lb
  • Country of Origin: China
  • Brand name: Thompson's Water Seal
  • Item Dimensions: 4.1"L x 6.6"W x 11.0"H

User questions & answers

Question: Could this be used on an exterior door to help with swelling from humidity? If so how to apply
Answer: I doubt it would help much. It stops water penetration but not humidity problems.
Question: Can the protector be applied on damp wood
Answer: I think not.
Question: Will this work on outdoor mahogany floor
Answer: Yes will protect it
Question: Hello, Do you have to re-apply every year
Answer: Probably. To tell, splash some water on the finish. If the water forms bubbles, the surface is OK for another season. However, after a year the surface may look dirty, and so you may want to clean it and re-seal it. Again, after you clean the surface, splash some water on it and see whether the previous seal still holds.

DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon

DEFY

Based on 223 reviews Check latest price
  • WATER-BASED, CLEAR COMPOSITE DECK SEALER – This water based, clear wood and deck sealer protects composite wood from the harmful effects of the sun, while adding little to no change to the natural look of your composite deck.
  • FORTIFIED WITH ZINC NANO-PARTICLE TECHNOLOGY– It’s like sunscreen for your wood. Tiny zinc particles dispersed throughout the stain reflect damaging UV rays, preventing premature graying and color loss.
  • EXTREMELY DURABLE, HIGH QUALITY RESINS – DEFY Composite Deck Sealer is made with the highest quality resins available that have better resistance to fading and darkening. The result is a quality sealer that typically lasts a season or two longer than competitive products.
  • QUALITY THAT LASTS – DEFY Extreme Composite Deck Sealer is a premium-grade, clear deck sealer that is built to last. Keep your weathered composite deck, or fence looking great for longer by using DEFY.
  • EASY TO MAINTAIN – When it’s time to do a maintenance coat, there’s no need to strip the surface. Make sure the surface is clean, then apply a single maintenance coat of DEFY Composite Waterproofing Sealer.

User questions & answers

Question: What is the preferred application method according to the label
Answer: Apply to a clean, dry composite deck using a manual pump sprayer. Spray the sealer in an even , ample amount to soak in well. Cover end pieces and edges of boards thoroughly as well. Use a squeegee to get even coverage if necessary. Allow to dry thoroughly, 24 to 48 hours if needed. It will dry clear unless there is a deep puddle left standing upon application. (Small puddles will soak in and dry clear. Deep peddles may leave a slightly milky look after drying.) If you have no mold in your deck before you use this, this product will keep mold out of your composite deck for about three years.
Question: Is this product water based
Answer: I haven't put it down yet. I'm not sure if it's water based or not. I'm ordering a second gallon before I start as I won't have enough to finish. I will post what I find once I've had an opportunity to use it.
Question: I have eon decking which can't have any petroleum based products. what exactly is in this product and will it harm my eon decking
Answer: I don't know about your decking product, but we used this cleaner on our "TREX" deck, and it worked great. We power washed the deck before applying the cleaner, and it dried looking practically brand new.
Question: will this work on Trex decking
Answer: This works very well on Trex decking.

Product features

About SaverSystems

At SaverSystems, we understand the frustration people feel when they see what they've built deteriorate from the elements. Property is one investment you can bank on, but if it's made with concrete, masonry, or wood it needs to be protected. SaverSystems employs state of the art technology to help protect and save what you build.

SaverSystems has manufactured premium quality, water repellents and protective coatings for over 30 years. We make coatings for a variety of surfaces including wood, concrete, masonry. In addition to the DEFY brand, SaverSystems also manufactures ChimneyRx, MasonrySaver, & ChimneySaver branded products.

All of our products are manufactured in our production facilities located in Richmond, Indiana. Every product is produced under strict quality standards and formulated with the highest quality raw materials available. Our innovative solutions and coatings have stood the test of time, and are trusted by industry professionals and homeowners alike.

SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls.

SEAL-ONCE

Based on 327 reviews Check latest price
  • Specially Formulated to be Applied Around & Over Fresh or Salt Water
  • Water-based, Low VOC, Non-toxic; Safe for People, Pets, Plants & Marine Life
  • Superior Nanotechnology Penetrates Deep, Coating Wood Fibers at the Cellular Level
  • Performs like an Oil-Based Sealer Without any Harmful Chemicals or Side Effects
  • Creates a Flexible, Breathable Barrier that Enhances, Stabilizes & Protects Wood

User questions & answers

Question: How do appy on a cloudy day in the tropics ? A cloudy day here means.............it's going to rain . How critical is this
Answer: how long does it take to dry in 70 degree dry sunny weather
Question: Can you use a regular wood stain after applying
Answer: Yes the clear MARINE can be painted or stained. Or you can purchase a tint for SEAL-ONCE and use the MARINE as a sealer and stain. MARINE Features: • Clear formula can be painted or stained after treatment • Tinted formula provides additional UV protection • Available in 11 semi-transparent tint colors • Eco-friendly, Non-toxic; will not harm pets, plants, people or marine life • Ultra-low VOC, Water based • Can be applied around or over fresh or salt water • Flexible, breathable barrier, Stabilizes & protects wood • Prevents warping, cupping, wood rot & decay • Resistant to salt water spray • Prevents mold, mildew & algae growth • Soap and water cleanup
Question: I want to use this on a 6x6 wood beam at the opening to my walk-in shower (floor to ceiling). No direct shower spray. Will this seal it
Answer: Yes you may use it for this specific application. As suggested in a comment down bellow, you would want to make sure that it is fully cured before using the shower. Typically it would take 48 hours to cure but it may take longer depending on the environment.
Question: Can it be used on green treated lumber
Answer: Pressure treated lumber has to be dry.

Product features

The Science of SEAL-ONCE and Innovative Use of Nanotechnology in Wood Finishes & Stains

Unlike many top-coat sealers sold today that trap moisture below the surface, MARINE creates a flexible, breathable barrier which allows water vapor to escape. This key feature helps prevent damage to wood caused by water intrusion, such as: wood rot, decay, mold & mildew growth, cracking & splitting. Typical wood sealers form a barrier on the surface of the wood, trapping moisture below the surface. As the water evaporates, it causes the surface coating and the substrate to crack & peel, leaving a broken surface that requires continued maintenance and is susceptible to additional damage. SEAL-ONCE uses cutting-edge, nano-particle technology to allow wood to breath and help prevent water vapor damage by protecting wood from the inside out.

Water-based Product that Will Not Harm People, Pets, Plants, Livestock or Marine Life.

SEAL-ONCE products are ultra-low VOC, low odor, non-toxic, non-flammable and non-ozone depleting. They are safer for the environment, easier to apply than solvent based wood finishes and clean up with soap & water. They do not contain nitrates, phosphorous compounds or heavy metals like many Oil-based sealers & stains on the market today.

Quick & Easy Application

Apply first coat with a synthetic brush; pump-up garden sprayer; air-assisted; and/or airless sprayer. Use 15-17 tip and medium to coarse spray pattern. When spraying, always back brush for best results. Second coat can be applied once first coat has penetrated, but is still damp. Second coat must be applied within one hour of applying first coat. For best results, apply in the shade and out of direct sunlight. Clean-up brushes or sprayer with warm soapy water.

Choose from 11 Wood Stain Tints

MARINE can be tinted for use as wood stain in any of the 11 color tints available: Clear, Light Brown, Natural, Brown, Mahogany, Redwood, Bronze Cedar, Cedar, Black, Battleship Gray, Shale Gray & Cape Cod Gray. The tints are sold separately and when mixed with Clear, the tinted formula provides additional UV protection from harmful sun rays.

Surface Preparation & Coverage

Approximate coverage: 250-350 sq. ft./gallon per coat. Actual coverage will vary due to the porosity of the surface. All surfaces should be cleaned with SEAL-ONCE All Wood Cleaner before sealing for best penetration and performance. Remove all old coatings, dust, debris and loose material. Remove oil, grease, algae, grime, mill glaze and mold and mildew stains with appropriate cleaners.

STORM SYSTEM Storm Protector Penetrating Sealer & Stain Protector - Deck Protector, Fence Protector, Mahogany Stain, Redwood Stain - 291115-1 Gallon, Sienna

Based on 69 reviews Check latest price
  • Wood deck protector - A true oil-based semi transparent stain and sealer meant to protect and highlight the natural beauty of the wood grain.
  • Storm Wood Stain Protector is a semi transparent sealer that penetrates deep into the wood for added protection against Mother Nature.
  • Compatible with any wood species. Great for wood staining Mahogany, as a Mahogany sealer, Cedar sealer, Cedar fence sealer, Redwood, Pine wood stain, Douglas Fir, Spruce Stain, Cyress, and Pressure Treated.
  • Great for Decks, Fences, Siding, and other Wood Substrates. Can be used as a wood fence protector or any other wood substrate protector.
  • Applies easily with brush, roller, or spray application. Lap-Free Application & UV Protection

User questions & answers

Question: Does it take a long time to dry
Answer: We have had a ton of rain so I have not used it yet.
Question: How cold can I apply this to my covered porch?? Thanks rr
Answer: Hello, The application temperature must be between 50-90 F.
Question: Should I wipe down the wet spots after a few days of drying
Answer: Hello, Yes lightly wipe those spots and and make sure those areas are dry before putting into use. note: wet spots could have been caused by a lack of penetration into the wood (a previous stain or sealant could be the culprit), applying to heavy, or the presence of moisture in the wood.
Question: How do you open the plastic seal lid
Answer: Hello, Thanks for your question on this. The plastic lid can be slightly difficult to take off, but is applied to ensure safe transport. To remove, I have found that a paint can opener or flat head screw driver wedged either in the top or on the side on the can works pretty easily. Be sure not to use a hammer to try and wedge the flat head screw driver in, as you want to avoid damaging the metal can.

Product features

STORM PROTECTOR EXTERIOR STAINS KEEPING THE EXTERIOR BEAUTIFUL

Storm Protector stains are designed to stand up to whatever comes down. Whether it's months of baking sunlight and damaging ultraviolet rays, seemingly endless rain or brutal winters marked by ongoing cycles of freezing and thawing. Our Storm Protector Stains are there to ride out the storm.

Storm System

Storm Protector is a Semi-Transparent penetrating stain and sealer meant to protect and highlight the natural beauty of the wood grain.

Penetrates Deep into the Wood Grain

Storm Protector penetrates deep into the wood for added protection against Mother Nature.

Compatible with Most Wood

Storm Protector is compatible with any wood species including: Redwood, Cedar, Pine Douglas Fir, Spruce, Cypress, Mahogany, and Pressure Treated.

EASY APPLICATION
LONG LASTING BEAUTY
PERFECT SOLUTION FOR DECKS AND RAILINGS

Olympic Stain Maximum Deck Stain, Clear, 1-Gallon

PPG

Based on 584 reviews Check latest price

Product description

Olympic maximum Clear waterproofing sealant is olympic station's best sealant. In fact, it has been rated the #1 Clear sealant for three years in a row by a leading consumer magazine. Why does olympic maximum rate so highly well, it delivers enhanced waterproofing and sunblock UV defense to strengthen, protect, and condition wood fibers, ensuring the wood's natural beauty lasts. Olympic maximum with weather-ready application is also specifically formulated to allow you to stain when you want, not when the weather dictates all while getting the same excellent results. Weather-ready application provides four great benefits: you can clean and stain your wood on the same day - even after rain.The stain is rain-ready after just 8 hours.the stain can be applied when air and surface temperatures are as low as 35 Degrees Fahrenheit.If the surface is too hot to touch, lightly mist the surface before application of the stain. Olympic - America's most trusted brand since 1938. Olympic - exterior wood stain for decks & more.

  • Enhanced waterproofing protection to help make sure your wood is protected from cracking due to water

User questions & answers

Question: Title says 3 gl, options offers 5 gl. i click on 5 gl to the order but the order form shows 3 gl. so am i getting the 3 or 5 gl
Answer: I have the same problem. Did you ever find a replacement strainer that is easy to get out through the rack?
Question: Can this product be used in a paint sprayer
Answer: Outer diameter is 4.5", inner diameter 3". It fits my kitchen sink perfectly.
Question: Where can I get the clear in 5 gallon buckets? I love my new fence and don't want to apply any stain color
Answer: Yes, it works quite well for me. I have a double sink, so I bought two. I keep one on the garbage disposal side at all times to prevent silverware (etc) from falling in. This works very well in my kitchen.
Question: I am looking for "olympic natural look protector plus sealant ", for my red wood deck. is this the same one
Answer: There are two different models you must choose from. One is only a strainer, while the other is both a strainer and a stopper. Just pick the one that reads 'strainer stopper' and you'll be fine!

Product features

Stain + Sealant in One

Stain + Sealant in One protects and beautifies in one step.

Weather-Ready Application

Allows greater opportunities for staining when it may rain or when the weather may be too hot or cold.

Enhanced waterproofing protection

Helps make sure your wood is protected from cracking due to water.

Advanced SunBlock UV

Helps protects your wood from dangerous UV rays that can wear down the coating.

How much stain do you need to buy?

One gallon of wood stain covers approximately 250-350 square feed, which is enough for a small to medium deck. It should also cover both sides of a 25 foot long fence or a couple pieces of furniture.

Two Gallons

Two gallons of wood stain cover approximately 600 square feed, which should be more than enough for the standard deck project or a 50 foot long fence.

Three or more Gallons

Three or more gallons of wood stain will most likely only be needed on large projects, as they should cover over 850 square feed.

Note: Solid Color Stain requires two coats. You should effectively double your gallons purchased when using a solid.

How To Stain Your Wood Deck In 3 Easy Steps

Sweep debris from deck and then use a product such as Olympic Premium Deck Cleaner to penetrate the wood and lift dirt to the surface to be cleaned, as well as clean stains caused by mildew, dirt, algae and mold. Allow surface to dry.

STEP 2

Tape off any surfaces you don’t want stained. Also, avoid staining in direct sunlight or on hot surfaces because the stain will dry too fast to penetrate properly.

STEP 3

For clear, toner and semi-transparent stains, apply a thin coat with a high-quality brush, roller, paint pad, or spray. For solid stains, apply two thin coats with a brush, roller, or paint pad. To avoid lap marks, apply to a few boards at a time, keeping a wet edge.

For best results, backbrush into the surface to work finish into the wood and ensure the coating is even. Make sure to treat all areas of the wood, including joints, edges and ends.

You’re going to want to follow the directions on your stain container to determine if anything needs done after your final application.

Olympic Wood Stains: A reputation as durable as our products

Olympic Wood Stains has provided exceptional protection and durability for all wood types, applications and budgets since 1938.

Nothing protects and beautifies your wood like Olympic Exterior Stain. Trust the natural beauty of your wood to Olympic Stains.

Olympic Paints and Stains guarantees satisfaction with the application and performance properties of this product when applied to a properly prepared surface in accordance with label directions. This guarantee is limited to your choice of product replacement or refund of the purchase price. See product label for more details.

THOMPSONS WATERSEAL TH.042851-16 Semi-Transparent Waterproofing Stain, Woodland Cedar

Thompson's Water Seal

Based on 514 reviews Check latest price

Product description

Thompson's WaterSeal Waterproofing Stain provides complete outdoor wood protection. It waterproofs long after the initial water beading is gone. Use on decks and fences, outdoor furniture and exterior wood. Shows medium wood grain and medium color. 1-coat protects 4 years on decks or 6 years on fences and siding. Applies to freshly cleaned damp or dry wood. Prevents water damage. Advanced polymers provide fade resistant color. Coating resists mildew and UV damage.

  • Prevents Water Damage
  • Advanced Polymers Provide Fade Resistant Color
  • Coating Resists Mildew and UV Damage
  • Applies to Freshly Cleaned Damp or Dry Wood
  • Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood

User questions & answers

Question: The listing says semi-transparent, but the picture says transparent, which version is this
Answer: Semi
Question: Is this a gallon container of the product
Answer: Yes this is a one gallon of Thompson water seal
Question: what clear seal do you recommend to use on 12year old pressure treated planks
Answer: I've used Thompson's water-based semi-transparent stain/sealer 3 times now for my 15 year-old pressure-treated deck and it has always done a great job of covering and protecting the wood. It doesn't really last the 4 years they claim, but still very good. They also make an oil-based clear sealer and I use that on my cedar pergola, also very good stuff but it's hard to work with because it doesn't cleanup with water. As an alternative to the oil-base they have an all-purpose water-based clear sealer for wood and masonry. I would use that on my pergola if it was made of pressure treated wood, but with cedar I really want a penetrating oil. So for your pressure treated deck, I would recommend the water-based clear sealer. Given how well the semi-transparent stain has worked for me, I would expect good results with the clear as well. You will certainly want to clean the wood first if you expect to brighten the gray appearance of aged wood. I spray oxygen bleach on the wood first and then scrub with a stiff brush and rinse before sealing.
Question: Would this product work well on untreated Adirondack furniture
Answer: Yes, I think it would be suitable. I have only used it on my deck however. Good protection in a wet climate. Rub it down well after it dries to keep the color from getting on clothes though if you're using a color stain.

Product features

The Thompson's Company has earned a well-deserved reputation as identifying industry trends and emerging technologies.

In the early 1920’s, polymer chemist Edward Addis Thompson developed a formula that protected buildings from exterior water damage. His discovery became known as Thompson's WaterSeal Clear Multi-Surface Waterproofer and initially was used by architectural and construction firms for concrete applications.

THOMPSONS WATERSEAL TH.041841-16 Transparent Waterproofing Stain, Acorn Brown

Thompson's Water Seal

Based on 847 reviews Check latest price

Product description

Thompson's Water Seal waterproofing stain - transparent provides complete outdoor wood protection. It waterproofs long after the initial water beading is gone.

  • Prevents Water Damage
  • Advanced Polymers Provide Fade Resistant Color
  • Coating Resists Mildew and UV Damage
  • Applies to Freshly Cleaned Damp or Dry Wood
  • Exceeds Industry Standard ASTM D-4446 for Waterproofing Wood

User questions & answers

Question: Can this product be applied with a pump sprayer
Answer: I used a pump sprayer with no problems.
Question: What size is this product
Answer: Mine came in a Gallon can
Question: Can this be applied by roller please and thanks
Answer: Yes, I applied mine with a roller.
Question: when should i repeate? 1 year 2year
Answer: The first application was to a rather long ignored deck, say 5 or so years. I am about to redo it this spring, less than two years later. No idea of how long it will hold on what had been a very thirsty deck, but I hope two to three years.

Product features

The Thompson's Company has earned a well-deserved reputation as identifying industry trends and emerging technologies.

In the early 1920’s, polymer chemist Edward Addis Thompson developed a formula that protected buildings from exterior water damage. His discovery became known as Thompson's WaterSeal Clear Multi-Surface Waterproofer and initially was used by architectural and construction firms for concrete applications.

SEAL-ONCE NANO+POLY Penetrating Wood Sealer with Polyurethane - 5 Gallon. Water-based, Low-VOC, waterproofer & stain for decks, fences & log homes.

SEAL-ONCE

Based on 160 reviews Check latest price
  • Water-based sealer with advanced penetrating nanotechnology. This premium wood sealer performs like an Oil-based product, without any noxious solvents or toxic chemicals.
  • Great investment to enhance and extend the natural life of wood. Protects against water damage for up to 10 years on vertical surfaces & 6 years on horizontal.
  • Ultra Low-VOC wood sealer safe for people, pets, plants or marine life. Easy to apply with soap & water clean-up. Save time with wet on damp application.
  • Prevents warping, cupping, wood rot, mold, mildew, staining, decay & will not peel.
  • When used as a wood stain creates a UV barrier to prevent fading. Rich color palette available in 11 different color tints. Clear formula allows wood to turn gray naturally

Product features

The Science of SEAL-ONCE and Innovative Use of Nanotechnology in Wood Finishes & Wood Stains

Unlike many top-coat sealers sold today that trap moisture below the surface, NANO+POLY creates a flexible, breathable barrier which allows water vapor to escape. This key feature helps prevent damage to wood caused by water intrusion, such as: wood rot, decay, mold & mildew growth, cracking & splitting. Typical wood sealers form a barrier on the surface of the wood, trapping moisture below the surface. As the water evaporates, it causes the surface coating and the substrate to crack & peel, leaving a broken surface that requires continued maintenance and is susceptible to additional damage. SEAL-ONCE uses cutting-edge, nano-particle technology to allow wood to breath and help prevent water vapor damage by protecting wood from the inside out.

Water-based Product that Will Not Harm People, Pets, Plants, Livestock or Marine Life.

SEAL-ONCE products are ultra-low VOC, low odor, non-toxic, non-flammable and non-ozone depleting. They are safer for the environment and do not contain nitrates, phosphorous compounds or heavy metals like many Oil-based sealers & stains on the market today.

Quick & Easy Application

Apply first coat with a synthetic brush; pump-up garden sprayer; air-assisted; and/or airless sprayer. Use 15-17 tip and medium to coarse spray pattern. When spraying, always back brush for best results. Second coat can be applied once first coat has penetrated, but is still damp. Second coat must be applied within one hour of applying first coat. For best results, apply in the shade and out of direct sunlight.

Available in 11 Tinted Wood Stain Colors

NANO+POLY can be tinted for use as wood stain & wood finish in any of the 11 color tints available: Clear, Light Brown, Natural, Brown, Mahogany, Redwood, Bronze Cedar, Cedar, Black, Battleship Gray, Shale Gray & Cape Cod Gray. The tints are sold separately and when mixed with Clear, the tinted formula provides additional UV protection from harmful sun rays.

Surface Preparation & Coverage

Approximate coverage: 250-350 sq. ft./gallon per coat. Actual coverage will vary due to the porosity of the surface. All surfaces should be cleaned with SEAL-ONCE All Wood Cleaner before sealing for best penetration and performance. Remove all old coatings, dust, debris and loose material. Remove oil, grease, algae, grime, mill glaze and mold and mildew stains with appropriate cleaners.

Eco Advance Wood Siloxane Waterproofer Concentrate - Makes 1 Gallon

Eco Advance

Based on 206 reviews Check latest price

Product description

16 ounce concentrate makes 1 gallon of commercial-grade water Repellent when mixed with clean water.  this easy-to-use spray-on formula provides long-lasting protection for your exterior wood projects including:  decking, wood fence, gondolas/pergolas, plywood, wood siding, wood shingles, etc. This product differs from most water repellents because of its vapor transmission abilities which allow for long-term product and substrate performance.  this allows substrates to still cure and prevents moisture from being trapped which can lead to a rapid degradation of the substrate. .

  • Liquid concentrate formula makes 1 gallon of commercial grade water proofer
  • Ideal for use on wood decking, wood fences, plywood, wood shingles, wood siding and much more
  • Protects against water damage, oil, stains, mold, mildew, de-icing salts, and pool/spa chemicals
  • Water-based, non-toxic, non-flammable formula does not harm landscape plantings
  • Vapor permeable (breathable) water proofer can be used on new wood

User questions & answers

Question: I already put linseed oil on my pine joists (in my shower) over a year ago now. Could I now put this product on for a better waterproof seal
Answer: I don't see why not. It has been a year. If it was only a few months, I would not use it.
Question: Can this be used on outdoor cedar furniture to seal and maintain the woods natural color
Answer: I have not tried cedar specifically but so far the all the other types of wood have kept their original color. There was a little bit of a whitish film right after application but that went away after it soaked in.
Question: If i use this on a trellis made of new pine 2x4s, how long can i reasonably expect it to last? when will i want to to reapply? no ground contact
Answer: If you apply the product generously and then come back before it dries and do another light application you should get a minimum of 3 years and most likely 5 years.
Question: I have made a wooden sink cover for my kitchen. Would this product keep the wood from warping/taking on water damage
Answer: We used this product in the back of a box truck. The floor has been wet many times over the last year and the wood has held up great. We have no warping or damage. Good luck.

Thompsons WaterSeal TH.A21711-16 Advanced Natural Wood Protector, gallon

Based on 537 reviews Check latest price

Product description

Thompson's WaterSeal Advanced Natural Wood Protector - Specially formulated for wood, Thompson's WaterSeal Advanced Natural Wood Protector provides one-coat maximum strength protection with a coating that resists mildew and UV damage, allowing your wood to maintain its natural color. With a patented formula, this advanced waterproofer enables you to clean and treat in one day and to apply immediately to new pressure-treated wood.

  • Long-Lasting Coating Resists Mildew Growth, UV Damage and Fading
  • One Day Project - Applies to both damp or dry wood in just one coat
  • Water-Based for Easy Soap and Water Clean Up
  • Waterproofer product
  • Use on decks, fences, exterior furniture and exterior wood
  • Maximum strength one coat waterproofer
  • Advanced protection against water damage
  • Exceptional, long lasting beading and waterproofing

User questions & answers

Question: How effective is this compared to other wood preservative products--green/brown/copper stains--you have used for wood touching ground
Answer: It is not as effective as tinted products. I apply it every year, and it seems to have extended the life of my 22-year-old cedar deck. It's not great, but I think that's the cost of using a clear product. The deck gets a lot of snow. And there is one area that never sees the sun. Those boards never get to dry completely, and 2 of them needed to be replaced after about 20 years. Those that do get some sun are still solid.
Question: Can I use this to coat wooden clipboards to protect from liquids
Answer: Thompsons Water Seal will protect anything made of wood. Just paint the TWS on with a brush and let dry for 24 hours and apply a second coat. Make sure you coat the edges really well also.
Question: What is product sheen ? I want a matte / satin when dried. This is for cedar posts on a covered deck, doesn't see much sun or rain. Thanks
Answer: Not too much sheen. Great product for our fence.
Question: Is this appropriate for ground-contact Douglas Fir for kids sandbox/playset? Trying to avoid pressure-treated and the cost of redwood if possible
Answer: Enclosed please find the CAUTION use for this product by the manufacturer.Also have in mind this product is for EXTERIOR USE ONLY.I hope this will help to answer your question.CAUTIONSCAUTIONS: Use only with adequate ventilation. For exterior use only. To avoid overexposure, if treating enclosed exterior rooms or porches, open windows and doors or use other means to ensure fresh air entry during application and drying. If you experience eye watering, headaches, or dizziness, increase fresh air, or wear respiratory protection (NIOSH approved) or leave the area. Avoid contact with eyes and skin. Wash hands after using. Keep container closed when not in use. Do not transfer contents to other containers for storage. FIRST AID: In case of eye contact, flush thoroughly with large amounts of water. Get medical attention if irritation persists. If swallowed, call Poison Control Center, hospital emergency room, or physician immediately. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. DO NOT TAKE INTERNALLY. KEEP OUT OF THE REACH OF CHILDREN.

Product features

The Thompson's Company has earned a well-deserved reputation as identifying industry trends and emerging technologies.

In the early 1920’s, polymer chemist Edward Addis Thompson developed a formula that protected buildings from exterior water damage. His discovery became known as Thompson's WaterSeal Clear Multi-Surface Waterproofer and initially was used by architectural and construction firms for concrete applications.

Olympic Stain Smartguard Concentrated Multi-Surface Sealant, Clear, 15oz

Olympic Stain

Based on 174 reviews Check latest price

Product description

Olympic smart guard is the smarter way to seal. The Clear concentrate dries in only 1 hour allowing you to prep, clean and enjoy your deck in less than a day. Easy, fast, strong. Olympic Smart Guard Waterproofing Sealer penetrates the substrate to provide advanced durability and protection. Olympic Smart Guard clear deck sealant can be applied to wood decking, concrete patios, masonry, and even composite decks after rain or cleaning and dries in 1 hour. It is formulated to be extremely fast and easy to apply, especially from a pump sprayer, but applies easily with brush or roller as well. Smart Guard is a completely different sealant technology that penetrates wood to protect it from water damage at the surface and below. SmartGuard is highly water-repellent, but allows wood to breathe. Less water trapped in the wood means less water damage. When it comes to your outdoor space, Smart Guard is a versatile and convenient sealing solution. It seals wood, concrete, masonry and weathered composite, and its super-concentrated formula covers up to 500 square feet. One small, easy-to-handle, easy-to-pour pouch covers as much as two gallon cans. Easy Three-Step Spray Application: Simply add 2 gallons of water into your sprayer Pour in entire pouch of Olympic SmartGuard Pump and spray. Apply liberally See product label for full prep, application and disposal instructions.

  • Stain Your Deck Quickly And Easily - Olympic Smart guard is a patent-pending deck stain product that allows you to simply spray on the sealant eliminating the need for back-brushing your deck.
  • Simple Stain Process - To apply Olympic SmartGuard Deck Sealant simply pour the pouch into a deck sprayer, add 2 gallons of water, and then spray over your deck - it works on traditional wood decks, concrete, and even composite decking!
  • Quick Dry - Dries in 1 hour so you can entertain or spend time outdoors with less hassle and less disruption. Apply this deck sealant quickly and get back to enjoying your day.
  • Use Even After Rain - Can be applied after cleaning or rain ensuring you get to have fun on your deck as quick as possible
  • Durable - Strong durability and waterproofing protection makes Olympic Smart Guard the smart choice for any homeowner who wants to seal their wood or composite deck quickly and still enjoy the outdoors
  • Multi-Surface Use - While many deck sealants only work on wood, Olympic Smart Guard works as a sealant on Wood Decks, Concrete Patios, Masonry, and even weathered Composite Decks
  • A Trusted Name In Deck Stain Technology - The Olympic brand has been trusted to provide quality results since 1938. Its history of excellence and expertise has made Olympic Stains a category leader with a reputation for delivering innovation and durability at an affordable price. Gorgeous results are always guaranteed with Olympic Stains. With a full range of exterior stains, resurfaces and wood cleaners, we have the products you need to complete your next wood staining project right.

User questions & answers

Question: Does it contain teflon
Answer: The product is great and very stable. It is possible to “under mount“ this product. Sink will have to be mounted to a “subframe support” conforming to the entire perimeter of the bowl. The sink can be attached to a 3/4 - 1” frame using the supplied mounting clips. Anything thicker will be questionable. Allow for 1/8” (sink-lip) space between the subframe and the bottom surface of your counter material. An ample application of silicone sealant (Clear) between sink and the counter top will do the job.
Question: Can this be used on painted deck
Answer: Approximately 7 1/2” on my sink.
Question: Can it be brushed on
Answer: The roll up dish rack is included in the package. If not included, pls email to us through [email protected] with your order ID, we will make this correct.
Question: May wood surface be painted with finish after being treated with this sealant
Answer: For proper fit, we recommend taking the exterior dimension of the sink(left to right) and adding at least 3" for access to install hardware. Actually, can be smaller a little than we suggest.

Product features

Clean, Seal, and Enjoy All in One Day!

Olympic SmartGuard multi-surface waterproofer is a concentrated clear sealer formulated for easy application and fast dry. Olympic SmartGuard Waterproofing Sealer penetrates the substrate to provide advanced durability and protection. It can be applied after rain or cleaning and dries in 1 hour. It is formulated to be extremely fast and easy to apply, especially from a pump sprayer, but applies easily with brush or roller as well.

Simple Spray-On Application

Simply add 2 gallons of water into your sprayer. Pour in entire pouch of Olympic SmartGuard wood and composite deck sealant, pump and spray. Apply liberally.

Clean, Seal and Enjoy in one day!

When it comes to sealing your deck, Olympic SmartGuard can save you time. It can be applied to damp wood, even after cleaning or rain. Dries in 1 hour, so your surface is back in use 1 hour after application

Highly Water Repellent

SmartGuard is a completely different sealant technology that penetrates wood to protect it from water damage at the surface and below. SmartGuard is highly water-repellent, but allows wood to breathe. Less water trapped in the wood means less water damage.

Clean your Deck

Use Olympic Premium Deck Brightener and Wash to clean your deck, removing mold and mildew stains. This will also help restore weathered wood. Be sure to scrub your deck thoroughly to ensure the cleanest possible surface.

Mix in a Pump Sprayer

While you can apply SmartGuard in a traditional way, the formula is particularly convenient when used with a pump sprayer. Mix it into your sprayer with 2 gallons of water.

Apply to your Deck

Spray the mix onto your deck! Apply as much as you see fit, as you want to guarantee you're covering every inch of your deck. You can also use a brush to brush SmartGuard on to harder to reach surfaces, like a railing.

Let Dry and Enjoy

Let the surface dry for 1 hour and your newly-stained deck is complete!

Seals and Stains Wood

When it comes to your outdoor space, SmartGuard is a versatile and convenient sealing solution.

Protects Concrete

It seals wood, concrete, masonry and weathered composite, and its super-concentrated formula covers up to 500 square feet.

Keeps Masonry Safe

One small, easy-to-handle, easy-to-pour pouch covers as much as two gallon cans.

Yes, Even Composite!

Easily stain or seal your surface of choice with Olympic SmartGuard.

About Olympic Stains

A Reputation as Durable as Our Products

The Olympic brand has been trusted to provide quality results since 1938. Its history of excellence and expertise has made Olympic Stains a category leader with a reputation for delivering innovation and durability at an affordable price. Gorgeous results are always guaranteed with Olympic Stains. With a full range of exterior stains, resurfacers and wood cleaners, we have the products you need to complete your next wood staining project right.

At Olympic Stains, we are constantly innovating new ways to help you stain your next project.

Precision Defined Deck Stain Brush | Large 7-Inch Deck Brush for Paints, Stains and Sealers (7-Inch)

Precision Defined

Based on 168 reviews Check latest price

Product description

We know you’re tired of the long arduous process of staining and sealing your deck, every single year. It used to take forever on your hands and knees with handheld paint brushes, brushing up and down, left and right. Say no more! Introducing the Precision Defined Ultimate Deck Brush, the most durable, professional quality brush for staining, sealing and painting your deck, patio or porch.



Gone are the days of crawling on your hands and knees getting every wood crack come spring. Instead, simply screw in a long paint brush extender with the PD deck brush and stain away! Get the job done 2x faster while at the same time saving your back and knees.



With your Precision Defined Deck Brush, you can use both water and oil based paints, stains, and sealers; including very thick desk restore paints! That’s not all – you can use your Deck Brush to seal concrete, pavers and brickwork with your favorite sealer and paints.



Built with heavy duty bristles and natural wood enclosure, the deck brush will be your best tool to get those decks done in half the time it used to.



Precision Defined 7-Inch Deck Brush

  • Finish quicker get the job in half the time with the ultimate deck brush
  • Versatile for use with paints, stains and sealers on a variety of surfaces ranging from wood to concrete
  • Universal pole threads to fit most paint extension poles, utility poles and flow-thru extension poles
  • Easy to clean after every use. Note, if using an oil based stain, paint or sealer, use a paint solvent or mineral turpentine to get rid of the oil-based liquid. Use a metal comb to loosen the fibers back up after every wash



Technical Specifications:

  • Deck Brush: 7" Wide × 2" Thick
  • Long Bristles and attaches to extension pole (not included)

  • ✅ FINISH QUICKER AND SAVE TIME: The only time your honey asks you to finish quicker - get Precision Defined Ultimate Deck Brush to finish staining your deck, patio or porch in record time. Easily coat each wood panel with a wide 7-inch brush applicator in one simple sweep.
  • ✅ VERSATILE FOR PAINTS, STAINS, SEALERS: Universal application for paints, stains, waterproofers, and sealers for both rough and smooth surfaces. The bristles are firm enough to be used on a natural wood surface and even hard enough to be used on concrete floors. These bristles have a long life with good care after use.
  • ✅ UNIVERSAL THREAD: Compatible with most paint extension poles, utility poles and flow-thru extension poles, the deck brush was made for universal application. The brush was designed for most household brooms and paint extension poles - so you can easily grab what you have to get the job done fast.
  • ✅ DURABLE, PROFESSIONAL QUALITY BRUSH: Durable deck brush that is built from the ground up with high quality materials. From the natural wood brush head to the firm bristles doing the brushing, each deck brush goes through rigorous testing before sending it off to you. No bristles shedding. No replacement pads. We know getting that job done is priority #1, and the deck brush quality is no exemption. Feel the professional quality difference and see how durable this brush will last.
  • ✅ GUARANTEE: At Precision Defined, we stand behind our products. We’re so confident that this 7-Inch Deck Brush is better than any you can find in your local hardware store that we offer a full guarantee. Even if you start your project and dislike the brush while staining, we’ll make sure to get you a replacement or refund so you get your project done right.

User questions & answers

Question: Will this work with super thick deck stains? the deck stain i'm using is so thick i can't get much on a roller. the stain can fill upto 1/4 inch crack
Answer: I’m sure it will not work. It works great on oil stains, which are thinner than paint, more like water. If you are using Behr Deckover I would seriously encourage you do some research - that is notoriously hard to apply successfully (think class action lawsuits). Good luck.
Question: What is the difference between this product and Deck Boss
Answer: I’d say price? I have this one and it works great! I’d definitely save the extra$$$ and go with this
Question: Would this really work for solid color deck stain or is it meant for thinner transparent stains
Answer: This product, will work for both. It is also easy to clean.

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