4 best waterproof caulks

Waterproof caulks, such as silicone caulk, are sealant products commonly used in various applications to create a watertight and weatherproof barrier. These products are essential in construction, home improvement, and various industrial applications. Here's what you need to know about waterproof caulks:

Composition: Waterproof caulks are typically made from a variety of materials, with silicone being one of the most popular choices. Silicone caulks are known for their excellent water resistance and flexibility. Other types of waterproof caulks include latex, polyurethane, and hybrid formulations.
Water Resistance: The primary purpose of waterproof caulk is to create a moisture-resistant barrier. When applied correctly, it prevents water from penetrating gaps and joints in various surfaces, including around sinks, showers, windows, doors, and exterior seams.
Flexibility: Many waterproof caulks, particularly silicone-based ones, remain flexible after curing. This flexibility allows them to withstand movements, such as expansion and contraction in buildings, without cracking or losing their seal.
Adhesion: Waterproof caulks adhere well to a wide range of surfaces, including wood, metal, glass, concrete, and plastic. Proper surface preparation is crucial to ensure good adhesion.
Mold and Mildew Resistance: Some waterproof caulks are formulated with additives that make them resistant to mold and mildew growth. This is especially important in damp environments like bathrooms and kitchens.
Paintability: Not all waterproof caulks are paintable, so it's essential to check the product specifications if you plan to paint over the caulk after application. Some caulks are specifically designed to be paintable, while others are not.
Curing Time: The curing time for waterproof caulks varies depending on the type and brand. Some caulk formulations can cure relatively quickly, while others may take several hours or even days to fully set and provide maximum water resistance.
Temperature Range: Consider the temperature range in which the caulk will be exposed. Some waterproof caulks are designed to withstand extreme temperatures, making them suitable for outdoor applications.
Application Method: Waterproof caulk can be applied using a caulking gun, squeeze tube, or in some cases, with a putty knife or your finger. The application method may vary depending on the specific product and the size of the gap or joint you need to seal.
Cleanup: Different caulks require different methods of cleanup. Some can be cleaned up with water, while others may require solvents.Be sure to follow the manufacturer's instructions for proper cleanup.
Compatibility: Ensure that the caulk you choose is compatible with the materials you are sealing. For example, certain caulks are designed specifically for use with certain types of roofing materials or plumbing fixtures.
Durability: The durability of waterproof caulks can vary, so it's important to select a product that suits the specific application and expected wear and tear.

When selecting a waterproof caulk, it's essential to read the product label and follow the manufacturer's instructions for the best results. Proper application and curing are critical to achieving a long-lasting and effective waterproof seal in your desired application.

Below you can find our editor's choice of the best waterproof caulks on the market

Gorilla Clear 100 Percent Silicone Sealant Caulk, Waterproof and Mold & Mildew Resistant, 10 Ounce Cartridge, Clear, (Pack of 1)

Gorilla

Based on 3 reviews Check latest price

Product description

Tough, clear, 100% silicone sealant. Gorilla sealant is great for kitchen, bath, window, doors, auto, marine Plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant and won't yellow, shrink or crack over time! Directions: all surfaces should be clean and free of dirt, grease, oil and old sealant. Best if used above 40F. Cut tip to desired bead size. Apply sealant with a caulking gun. Smooth bead immediately after application, before a skin forms. Store in cool, dry location. Clean-up: wipe wet sealant off project immediately with a dry cloth. Isopropyl alcohol may be used according to solvent manufacturer’s instructions. Click on the Gorilla link at the top of this page to see other quality products from the Gorilla glue company.

Incredibly versatile 100% silicone sealant that dries translucent clear
Best for sealing gaps or cracks between two surfaces; Works on window, door, kitchen, bath, gutters, auto, marine and more
Indoor/outdoor; 100% waterproof
Won't yellow, shrink or crack
Mold and mildew resistant

User questions & answers

Question:	Do you have to use a caulking gun to apply this
Answer:	well, in certain uses you can squirt some out on a flat surface and use a spatula scraper to spread it on.
Question:	Does this come in almond? Can it be used on vinyl siding
Answer:	Hello, Gorilla Clear 100% Silicone Sealant is available in clear and white. It can be used on vinyl surfaces. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #313009. Thank you, The Gorilla Glue Company
Question:	Can i paint ovet on exterior siding
Answer:	Hello, Gorilla Clear 100% Silicone Sealant is not paintable. For further assistance with your application, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #197631. Thank you, The Gorilla Glue Company
Question:	Can I use this product to fix loose outdoor ceramic tiles due to worn grout
Answer:	Hello, Gorilla Clear 100 % Silicone Sealant works well to seal around tiles surfaces. To reattach the tile, we recommend Gorilla Heavy Duty Construction Adhesive. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #293402. Thank you, The Gorilla Glue Company

Product features

Gorilla Clear Silicone Sealant

Gorilla 100% Silicone Sealant* is great for kitchen, bath, window, doors, auto, marine plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant won't yellow, shrink or crack over time!

*as cured

100% Waterproof

Can be used indoor or outdoor.

Won’t Yellow Over Time

Mold & Mildew Resistant

Gorilla White 100 Percent Silicone Sealant Caulk, Waterproof and Mold & Mildew Resistant, 10 ounce Cartridge, White, (Pack of 1)

Gorilla

Based on 3 reviews Check latest price

Product description

Tough, white 100% silicone sealant. Gorilla sealant is great for kitchen, bath, window, doors, auto, marine Plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant and won't yellow, shrink or crack over time! Directions: all surfaces should be clean and free of dirt, grease, oil and old sealant. Best if used above 40F. Cut tip to desired bead size. Apply sealant with a caulking gun. Smooth bead immediately after application, before a skin forms. Store in cool, dry location. Clean-up: wipe wet sealant off project immediately with a dry cloth. Isopropyl alcohol may be used according to solvent manufacturer’s instructions. Click on the Gorilla link at the top of this page to see other quality products from the Gorilla glue company.

Incredibly versatile 100% silicone sealant that dries translucent white
Best for sealing gaps or cracks between two surfaces; Works on window, door, kitchen, bath, gutters, auto, marine and more
Indoor/outdoor; 100% waterproof
Won't yellow, shrink or crack
Mold and mildew resistant

User questions & answers

Question:	Can you paint over this caulk
Answer:	Hello, Gorilla White 100% Silicone Sealant is not paintable. We do have a Gorilla Paintable White Sealant, however. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #295635. Thank you, The Gorilla Glue Company
Question:	aquarium safe
Answer:	Hello, Gorilla 100% Silicone White Sealant has not been tested on animals and is not recommended for aquarium use. If we can be of further assistance with your application, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #216991. Thank you, The Gorilla Glue Company
Question:	How many linear feet with this cover with an 1/8 inch bead
Answer:	Hello, A 10oz. cartridge of Gorilla White 100% Silicone Sealant will cover 52 linear feet using a 3/16 inch bead. This is approximately enough to caulk two bathtubs and one sink, or three standard doors and four windows. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #288717. Thank you, The Gorilla Glue Company
Question:	If used in the shower will it get moldy from the constant water
Answer:	Hello, Gorilla 100% Silicone Sealant contains fungicide and is mold and mildew resistant. Silicones are inherently resistant to microbial growth because they are inorganic. But, because they are frequently used in high humidity environments with the potential to collect dirt, soap, and other deposits commonly found in bathroom spaces, mold and mildew can grow on the surface of the sealant and consume these deposits as food sources. The fungicide leeches to the surface of the sealant to provide continuous (though not unlimited) control and resistance to growth. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #243740. Thank you, The Gorilla Glue Company

Product features

Gorilla White Silicone Sealant

Gorilla Silicone Sealant is great for kitchen, bath, window, doors, auto, marine plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant won't yellow, shrink or crack over time!

30 Minute Rain-Ready

Can be exposed to water in as little as 30 minutes based on a 3/16” bead. Otherwise, wait 24 hrs.

Flexible Formula

GREAT FOR: Kitchen, Bath, Window, Door, Plumbing, Gutters, Auto, Marine and more!**

Won’t Yellow Over Time

Won't yellow shrink or crack

Gorilla 100 Percent Silicone Sealant Caulk, 2.8 ounce Squeeze Tube, Clear, (Pack of 1)

Gorilla

Based on 4 reviews Check latest price

Product description

TOUGH, CLEAR, 100% SILICONE SEALANT. Gorilla Sealant is great for kitchen, bath, window, doors, auto, marine plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant and won't yellow, shrink or crack over time! Directions: All surfaces should be clean and free of dirt, grease, oil and old sealant. Best if used above 40F. Unscrew cap, fold and screw-on nozzle. Cut to desired bead size. Apply sealant, pushing bead ahead of nozzle. Smooth bead immediately after application, before a skin forms. Storage: Replace cap tightly to prevent material from curing. Store in cool, dry location. To re-use nozzle, remove sealant from nozzle once cured. Clean-Up: Wipe wet sealant off project immediately with a dry cloth. Isopropyl alcohol may be used according to solvent manufacturer’s instructions. Click on the Gorilla link at the top of this page to see other quality products from the Gorilla Glue Company. APPLICATION TEMPERATURE – Best above 40 Degrees Fahrenheit

, SERVICE TEMPERATURE – -40 to 350 Degrees Fahrenheit

and STORAGE TIPS – Store in a cool, dry location away from heat. Cartridge-store with nozzle attached. Tube-remove nozzle and replace cap tightly.

Incredibly versatile 100% silicone sealant that dries translucent clear
Best for sealing gaps or cracks between two surfaces; Works on window, door, kitchen, bath, gutters, auto, marine and more
Indoor/outdoor; 100% Waterproof
Won't Yellow, shrink or crack
Mold and Mildew resistant

User questions & answers

Question:	Will this product work on homemade snow globes
Answer:	that would depend on what the snow globes are made of (what Materials will be glued together?)
Question:	Could I use this to seal a cracked double pane window
Answer:	Yes, silicone sealant will seal the glass, but there are issues with this repair. Many newer double pane windows are gas charged, so if not properly repaired will not function as efficiently. Sealing the crack on any double pane window will seal out moisture, but also seal moisture in, so if it is not properly evacuated, you may get condensation between the panes with weather changes.
Question:	Is this food safe
Answer:	Hello, Gorilla 100% Silicone Sealant is considered to be food safe once fully cured in areas where there is a possibility of food contact, like a food prep area countertop. For further assistance with your application, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact. Thank you, The Gorilla Glue Company
Question:	Can I use it as adhesive to attach shower caddy on tile wall? I searched silicone adhesive, but this product shown
Answer:	This material is conventional silicone rubber sealant, and is not intended to be an adhesive. If your "shower caddy" is lightweight, it might work but I certainly would not trust it for a long-term solution. It will easily peel of of a ceramic or plastic tile surface. There are waterproof adhesives that are much better for this task.

Product features

Gorilla Clear Silicone Sealant

*as cured

100% Waterproof

Can be used indoor or outdoor.

Won’t Yellow Over Time

Mold & Mildew Resistant

Gorilla Paintable Silicone Sealant Caulk, Waterproof and Mold & Mildew Resistant, 9 ounce Cartridge, White, (Pack of 1)

Gorilla

Based on 307 reviews Check latest price

Product description

Gorilla Paintable Silicone Sealant provides a strong waterproof seal great for window, door, trim, siding, gutters and more! This sealant is paintable in 30 minutes and water ready in just 15 minute. Gorilla Paintable Silicone Sealant resists mold and mildew and is shrink and crack proof creating a long lasting seal. Directions: All surfaces should be clean and free of dirt, grease, oil and old sealant. Best if used above 40F. Cut tip to desired bead size. Apply sealant with a caulking gun. Smooth bead immediately after application, before a skin forms. Store in cool, dry location. Clean-Up: Wipe wet sealant off project immediately with a dry cloth. Isopropyl alcohol may be used according to solvent manufacturer’s instructions. Click on the Gorilla link at the top of this page to see other quality products from the Gorilla Glue Company.

Gorilla Paintable Silicone Sealant provides a strong waterproof seal great for window, door, trim, siding, gutters and more!
Paintable in 30 minutes and water ready in just 15 minute
Gorilla Paintable Silicone Sealant resists mold and mildew and is shrink and crack proof creating a long lasting seal
Indoor/Outdoor - All Weather
Great for: Kitchen, Bath, Window, Door, Plumbing, Gutters, Auto, Marine and more!

User questions & answers

Question:	Is it sandable
Answer:	Hello, Gorilla Paintable Sealant is not sandable. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #248691. Thank you, The Gorilla Glue Company
Question:	Do I have to use a caulk gun
Answer:	Yes. You need a caulk gun.
Question:	I know this is paintable, but is it stainable too? I want to use it to fill cracks and gaps in my wood siding before staining the house
Answer:	Hello, Gorilla Paintable Sealant is not stainable. If we can be of further assistance, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #312433. Thank you, The Gorilla Glue Company
Question:	How successful is the painting
Answer:	Hello, We recommend using acrylic/latex paint when painting over Gorilla Paintable Silicone Sealant. If we can be of further assistance with your application, please contact our Consumer Affairs team at 800-966-3458 or through our website at www.gorillatough.com/contact and reference case #194108. Thank you, The Gorilla Glue Company

Product features

Gorilla Paintable Silicone Sealant

Gorilla Paintable Silicone Sealant provides a strong waterproof seal great for kitchen, bath, window, door, plumbing, gutters and more! This sealant is paintable in 30 minutes, 15 minute rain/shower ready and provides mold & mildew resistance.