11 best gasket sealer

Product description

Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker is a fast-curing, sensor safe, low odor, non-corrosive formula that retains high flexibility, and oil resistance properties through use of a patented adhesion system. This gasket maker meets performance specs of OE silicone gaskets and is OEM specified. For dealership warranty requirements it also ensures extended drivetrain warranty compliance. Temperature range -65 degrees fahrenheit to 500 degrees fahrenheit intermittent; resists auto and shop fluids and vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Extended warranties, engine sensors and new component materials such as aluminum, bi-metal alloys and high-tech plastics, have created the need for superior RTV silicone gasket makers in both OEM production and service applications. Permatex always has the right gasket maker for your application.

• Sensor-safe, non-corrosive formula designed for superior adhesion to oily surfaces and long term durability
• Superior resistance to powertrain fluids including engine oil, transmission fluid, gear lube and coolants
• Retains high flexibility and eliminates the need for pre-formed, pre-cut, paper, rubber or cork gaskets; OEM specified and approved for dealership warranty requirements
• Temperature Range -65°F to 500°F (-54°C to 260°C) intermittent
• Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, and differential covers
• Fit Type: Universal

User questions & answers

Question:	Is it suitable to use this for a gasket around a part that is screwed into place. For example an oil drain bolt or drain valve
Answer:	Yes. Do not plan to use it as permanent. It will last for the duration the life of the oil or until you can get a regular bolt gasket.
Question:	Will this work as a thread sealer for a rear end differential drain and filler plug
Answer:	might work but permatex makes a better product for thread sealing #59214
Question:	Would you use this without a gasket, as the only gasket for rear differential cover
Answer:	It should be OK to use as the only gasket for the rear differential cover as it is recommended to be used in such fashion. I would not use it in conjunction with another gasket since it will increase the likelihood of leakage.
Question:	I need to repair gasket on my 05 side by side carburetor,s fuel bowl.WILL this work
Answer:	No. You need a gas-specific product. Like:http://www.amazon.com/Permatex-29132-MotoSeal-Ultimate-Gasket/dp/B000HBGHKE/ref=pd_bxgy_263_text_y

Product features

Permatex: The Trusted Name in Automotive Gasketing

Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker is a fast-curing, sensor safe, low odor, non-corrosive formula that retains high flexibility, and oil resistance properties through use of a patented adhesion system.

This gasket maker meets performance specs of OE silicone gaskets and is OEM specified. For dealership warranty requirements, it also ensures extended drivetrain warranty compliance.

Temperature Range -65°F to 500°F (-54°C to 260°C).

Product description

Permatex High Tack Gasket Sealant is a fast-drying all-purpose sealant that dries to a highly tacky, non-brittle film. A reliable general adhesive remains tacky indefinitely - can be applied in advance for convenience in assembly. Remains effective at temperatures of -65°F to 500°F (-54°C to 260°C). Sensor-safe and resistant to gasoline, oil, antifreeze, axle lube, kerosene, propane and butane.

• Reliable, fast-drying, all-purpose sealant dries to a highly tacky, non-brittle film; remains tacky indefinitely
• Tacky paste for holding cut gaskets in place during assembly; helps seal cut gaskets
• Resists gasoline, oil, antifreeze, axle lube, kerosene, propane and butane; sensor-safe
• Temperature Range: -65°F to 500°F (-54°C to 260°C)
• Suggested Applications: Valve covers, fuel pumps, carburetors, manifold gaskets; seals any rubber, cork, paper or composite gasket
• Fit type: Vehicle Specific

User questions & answers

Question:	Is this suitable for use on an oil filter housing gasket? the gasket lies between two cast aluminum pieces with up to 80psi of oil pressure
Answer:	Hello Rachel, Thank you for contacting us regarding. Yes, this pump is available for gasoline.
Question:	Hi, I need to buy 10 pieces of this permatex 80065, when are you going to have more in stock?, i see that you only have 2 in stock
Answer:	mine was for diesel fuel, not sure if it worked for gas also.
Question:	The big question is what is it like removing this stuff when things have to come apart again
Answer:	Why would you want to ,as I connected it directly to a gas container made from steel purchase from Northern tool No need for a water filter. It could be done just need to pump it between gas suction and spout
Question:	is this good when replacing radiator hoses
Answer:	I am not sure about that

Product features

Permatex 80062 High Tack Gasket Sealant, 4 oz.

Fast-drying all-purpose sealant dries to a highly tacky, non-brittle film. A reliable general adhesive remains tacky indefinitely can be applied in advance for convenience in assembly. Remains effective at temperatures of -65°F to 500°F (-54°C to 260°C). Sensor-safe. Resists gasoline, oil, antifreeze, axle lube, kerosene, propane and butane.

Product description

Permatex High-Temp Red RTV Silicone Gasket Maker is formulated for high temperature applications or heavy-duty use such as towing. It replaces almost any cut gasket by making reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating caused by thermal cycling. Coats pre-cut gaskets to increase reliability. Resists auto and shop fluids, with a temperature range of -65 degrees fahrenheit to 650 degrees fahrenheit intermittent. A first generation 1970-1980 gasket maker, it is OEM specified. Permatex offers significant performance advantages which include outstanding oil resistance, excellent torque retention and hi-temp, sensor-safe properties. Extended warranties, engine sensors and new component materials such as aluminum, bi-metal alloys and high-tech plastics, have created the need for superior RTV silicone gasket makers in both OEM production and service applications. Permatex always has the right gasket maker for your application.

• Formulated for hi-temp applications, or heavy-duty use
• Replaces almost any cut gasket, and coats pre-cut gaskets to increase reliability
• Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating
• Temperature range of -65F to 650F intermittent
• Suggested Applications: Valve covers, oil pans, timing covers, water pumps, thermostat housings, transmission pans

User questions & answers

Question:	Is this compatible with differential fluid
Answer:	Yes, 81160 is used on the differential cover.
Question:	is this food grade? or can i use this on ovens and BBQ grills? it will not directly touch the food but there is a chance that it will. thanks
Answer:	For my application (Smoker), I contacted permatex and this was there response... The response included a phone number, and I feel that if anyone has questions for themselves the best option is to directly contact them with your specific application.Many Thanks for your interest in Permatex productsPermatex has a High Temp. RED RTV Silicone Gasket Maker and is safe touse around food products .It is certifiedNSF/ANSI STANDARD 51 Food Equipment Materials ...( indirectly aroundfood )Temp. max. is 600 F continuous and 650 F intermittently ... TheUltra Copper is not NSFIf you have further questions feel free to call Tech. Service attoll-free @ 877.376-2839)....
Question:	would gasoline eat it? Wondered if it could fix a gas line
Answer:	Yes - gas would eat it, the only thing that will fix a gas line is a new one....
Question:	can it be used on shingles
Answer:	I used it to seal up an exhaust pipe joint on my car, which is very different from roofing, but my point is this is very sticky, durable stuff. I don't think it would stick very well to the small rocks on the up-side of a shingle (it would end up pulling them off if allowed to dry and then movement occurs), but for stopping leaks down below the shingles, I would think it might be a good choice. Might be a bit expensive compared to other sealants you could possibly use, though.

Product features

Directions for Use:

1- For best results, surfaces should be clean and dry.

2- Cut nozzle and apply a continuous 1/16” to ¼” (2 to 6mm) bead of silicone to one surface, surrounding all bolt holes. Assemble parts immediately while silicone is still wet. Finger tighten until material begins to squeeze out around flange.

3- Let dry for one hour then tighten to torque specifications.

4- Allow 24 hours to fully cure before filling with fluids or returning to service.

5- Replace cap after use.

Note: Not recommended for use on head gaskets or parts in contact with gasoline.

Product description

AT-205 Re-Seal is a fast, effective and safe stop-leak for all rubber seals and gaskets. The exclusive formulation restores worn or dried out seals and is not harmful to internal bearings and components. 

• Professional strength fast acting resealer, stops leaks fast
• Rejuivinates all rubber seals & gaskets in engines, transmissions, power steering, differentials and hydraulic systems
• Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
• Does not contain petroleum distillates, will not over-swell or breakdown seals
• 8oz bottle will treat a 6 quart capacity, adjust accordingly

User questions & answers

Question:	can this oil be used in synthetic engine oil
Answer:	Yes you can. It says so on their homepage (Note, that link from "C.B." is a false link and will redirect you to a false site.)From their real website: "Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil"I'm not posting a link, just google it, it's safer than relying on the spam/malware redirects in here.
Question:	So basically I just put this where I would put the oil and it should stop the leak? Thanks
Answer:	It should if the seal or other ring is not too far gone. But never put it in the gas tank, brake system, or cooling system....
Question:	Will this work in Chevy 4L60E transmissions
Answer:	I was reluctant to put it in my 4L60E, but I did when the leak got pretty bad and I didn't have time to fix it. I only put in 1 bottle when the instructions called for 2, but oh my goodness what a result. Stopped the leak completely in under a half hour. I was blown away... blown away. Thought it was snake oil, turns out this stuff is legit. Then as if that weren't enough... the darn transmission started shifting more crisply... tooootally unexpected side benefit. It has lasted almost exactly a year and now the leak is slowly starting to come back. I have no reservations about treating it again. Since it can't over-swell the seals, this time I'll be adding the recommended 2 bottles. This product is a rare diamond in the rough of snake oil products. So to answer your question, yes, apparently it does work in 4L60E transmissions.
Question:	Do I just dump the whole bottle in
Answer:	8oz bottle will treat a 6 quart capacity, adjust accordingly

Product features

AT-205 added to leaking system

AT-205 Re-Seal is added to any leaking engine, transmission, power steering system, differential or hydraulic system (except for brakes) to condition rubber seals/gaskets and stop leaks. Simply pour it in as you would be filling it with oil or fluid.

The formulation blends with the oil

The additive blends with oil in the system and is circulated throughout during operation, treating and conditioning rubber seals and gaskets.

Conditions and rejuvenates seals

AT-205 is a plasticizer, a type of chemical used in rubber manufacturing to set hardness and flexibility. As a seal or gasket gets older it can dry out, harden and wear - treating it with AT-205 will rejuvenate it, restoring it's flexibility and sealing properties.

Most leaks resealed within 5 hours

As long as the seal or gasket is not severely damaged or torn, the leak is resealed after a total of 5 hours of driving - saving time and money from costly repairs.

Product description

Gasgacinch Gasket Sealer and Belt Dressing provides unmatched gasket sealing properties, preventing leaks, reducing expensive repairs, and creates a superior grip as a belt dressing. Gasgacinch Gasket Sealer remains flexible and makes it easier to assemble and disassemble the engine or transmission. Often any residue of Gasgacinch may be removed simply by rubbing it away. Many other sealers require solvents or destructive scraping to clean off a head or flange. Gasgacinch adheres to carbon steel, alloy steel, aluminum, titanium, lead, magnesium, synthetic and natural rubber, copper and cork. Gasgacinch Gasket Sealer may be used in hot, cold, wet, dry, acid, basic, and abrasive environments. Gasgacinch, when cured, is flexible, has high-peel strength, high-shear strength, fatigue resistant, vibration dampening, high heat resistance, gasoline resistant, and oil resistant. Gasgacinch performs exceptional compared to other sealants that are pasty and thick. Competitor's thick material makes it difficult to seep into the small imperfections of the metal surfaces, creating air pockets where leaks will develop. In contrast, Gasgacinch is very fluid, which allows it to flow into the small imperfections of metal surfaces. GASGACINCH includes heat-resistant formulated compounds and contains NO HEAT RETAINING metal powders. Because of its superior composition, GASGACINCH has the versatility for a broad range of applications not found in other sealants. GASGACINCH's proven performance is preferred in nearly all mechanical industries including: auto repair, diesel and truck repair, high-performance engine builders, motorcycle repair and many more.

• Gasgacinch Gasket Sealer and Belt Dressing provides unmatched gasket sealing properties, preventing leaks, reducing expensive repairs, and creates a superior grip as a belt dressing
• Gasgacinch Gasket Sealer remains flexible and makes it easier to assemble and disassemble an engine or transmission, often any residue may be removed simply by rubbing it away
• Adheres to carbon steel, alloy steel, aluminum, titanium, lead, magnesium, synthetic and natural rubber, copper and cork, and may be used in hot, cold, wet, dry, acid, basic, and abrasive environments
• When cured, Gasgacinch is flexible, has high-peel strength, high-shear strength, fatigue resistant, vibration dampening, high heat resistance, gasoline resistant, and oil resistant
• Preferred in nearly all mechanical industries including: auto repair, diesel and truck repair, high-performance engine builders, motorcycle repair and many more
• Fit type: Vehicle Specific
• Flash point: -7.0 degrees_celsius

User questions & answers

Question:	I have a carburetor that won’t seal anymore. Can I use this to coat my gasket or saturate it in this? Will it fix the seal
Answer:	no problems there are a variety of chemicals that will remove this sealer quickly and quite easily brake parts cleaner naphta acetone to name a few mechanics will tell you which I am that you usually only have to use the sealer on one side of the gasket which will hold it to the part so for instance EX>. a thermostat housing will have the gasket sealer on the housing side so that when you unbolt it the housing comes off with the gasket attached to it and the intake manifold is still clean, but there are some instances where both sides would need sealer like you made the mistake of putting radiator stop leak in and now every part of your cooling system is clogged and the water can't circulate making the pressure build up & up till something lets go usually this will be the gaskets>>EX. thermostat, intake manifold, water pump so that's a little tip for you and here's another one if you did put some sealer into the radiator it must be cleaned out and the use of (a)cascade dishwasher powder will help (b)white vinegar and salt will take out the sealer plus any calcium deposits and rust from the complete engine cooling passages====== if this has happened use the vinegar mix first then the cascade then fresh with the baking soda to neutralize the acid content then fresh water again to clean it out altogether followed by fresh antifreeze and distilled water never add house water to your radiator or battery the calcium builds up in radiators very quickly and the impurity's kill the battery acid plates with the same build up that's just a few tips for you as a bonus O.K.
Question:	Anyone ever use this to glue Rubber Knee Pads to a Motorcycle Gas Tank? Results
Answer:	No. It is best used to hold paper gaskets in place prior to assembly on metal parts. It "dries" like rubber cement (the solvents evaporate quickly). If you use ANYTHING on hoses (I generally do not) I would use Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant available from Amazon as well https://www.amazon.com/Permatex-80019-Aviation-Gasket-Sealant/dp/B000HBM3QQ. It will remain soft and pliable and WILL seal hoses if they are a bit stiff and prone to leakage at the ends. It is
Question:	Can I apply this around the edge and bolts of the oil pan? Will it fix the leak
Answer:	Not really. I was also missing bolt hardware to attach feet and fuel gauge does not work.
Question:	How do you use this product as a belt dressing? Do you apply it with the belt moving or stationary on the engine
Answer:	Please be noted the suction tube is 2pcs extensible pipe, it could be adjusted from 26”to 36”.

Product description

BlueDevil Head Gasket Sealer is your head gasket repair solution as it will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. BlueDevil contains no solid or particulate matter and will not clog or harm your engine. It bonds to metal, aluminum, cast, alloy, or plastic, and it’s safe and easy to use as a permanent seal for your head gasket leak. BlueDevil Head Gasket Sealer is compatible in gasoline and diesel engines.

• Good for Head Gaskets, Warped or Cracked Heads, Heater Cores, and Freeze Plugs
• Contains no solid or particulate matter that can harm a vehicles engine
• Alternative solution for costly and time consuming repairs
• Safe and easy to use
• Permanent Repair

User questions & answers

Question:	I don't get the "remove thermostat" part. If i remove my thermostat where am i going to plug the hose into? Does it mean to replace it with a new one
Answer:	Most thermostats can be removed without causing a leak. I am guessing that yours might be like my truck where the gasket is incorporated into the thermostat. If so, you can probably adjust the time to allow the thermostat to open and replace it afterward. I cut the guts out of mine but it was probably overkill.
Question:	If i just replaced my thermostat do i need to remove it, it's such a pia
Answer:	Yes. For a "perfect" flush, the thermostat needs removed. Pain as it is, it's a good time to replace it.
Question:	How do I return the product if I have already used it
Answer:	You can't.
Question:	Im getting combustion in my radiator,not coolant in oil,will it work
Answer:	had same problem and it didn't work

Product description

The Blue Devil Engine and Cooling Sealant has the remarkable ability to repair and seal leaks in freeze plugs, leaking radiators and heater cores, cracked or warped heads and fix most blown head gasket by forming a permanently seal. The Blue Devil Engine and Cooling Sealant will also work on internal gasket leaks, where small amounts of coolant seep into the engine oil. Contains no solid or particulate matter. It is non-clogging and will not harm your engine. Bonds to metal, aluminum, cast, alloy or plastic. Is safe and easy to use. Works on cars, trucks, vans and SUV's with gasoline or diesel engines. Independent laboratory tests and confirm Blue Devil is the only sealer known to form a permanent seal and does not rely on particles, temporarily plugging leaks.

• Permanently Seals Blown Head Gaskets
• Permanently Seals Leaking Radiators
• Permanently Seals Warped & Cracked Heads
• Permanently Seals Leaking Heater Cores
• Includes 32oz Head Gasket sealer and 32 oz Flush

User questions & answers

Question:	New radiator do i still flush
Answer:	yEP, you want to flush the engine too that's why you remove the thermostat as part of the process.
Question:	Can thermostat be replaced afterwards once the Blue Devel repairs have been made
Answer:	Yes. The reason you remove the thermostat is to allow full flow of the coolant and blue devil liquid. After the repair is made you want to reinstall or replace the thermostat so the engine warms up and operates correctly. Also make sure that you have the heater controls in the full warm setting so that the coolant going through the heater core is not restricted while the blue devil fluid is being circulated.
Question:	After sealing the leak, does blue devil need to be drained and fresh antifreeze used
Answer:	Just follow the instructions on the label. I drained the radiator after treatment showed no leaks after 100 or so miles. My car still does not leak and it runs almost like new even though it has 147k on the odometer.
Question:	What is the warranty or guarantee if the product doesnt work
Answer:	Blue devil will not warrantee their product if bought from amazon or eBay. It Says this directly on their site. If bought from an authorized retailer and it happens to not work within 60 days of purchasing then you can get your money back.

Product description

Permatex Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker is designed specially for high-torque and high vibration applications, like those common in import engines. This premium RTV gasket maker exceeds manufacturers' performance requirements, featuring maximum vibration resistance and outstanding resistance to oils, cooling and shop fluids. Non-corrosive and low-odor, this gasket maker is guaranteed not to leak. OEM specified, with a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit, intermittent. Permatex always has the right gasket maker for your application.

• Designed specially for high-torque and high vibration applications
• Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids
• OEM specified, guaranteed not to leak
• Low odor and non-corrosive formula
• Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, water pumps, thermostat housings

User questions & answers

Question:	will this work on sealing rear ends filled with synthetic gear oil with ls added
Answer:	I would try and replace the pan gasket first
Question:	Is this good for vaulve cover Gaskets
Answer:	Having used this to seal gaskets (and for this use it is fantastic, no leaks but easy to remove later), I do not recommend using it as belt dressing; it gums up like rubber cement.
Question:	Can ultimate grey be used to hang a rear view mirror to the windshield. Mine falls off every few months
Answer:	80psi is pretty light pressure when it comes to engines and oil doesn’t get very hot unless there are extreme problems... almost any gasket sealer should work well. Most of these sealers are made strong enough to hold and seal the head gaskets which is many folds more pressure than any of the internal fluids.
Question:	can this be used on water pump Bolt threads
Answer:	We currently have 13 in stock

Product features

Permatex Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker

Designed specially for high-torque and high vibration applications, like those common in import engines, this premium RTV gasket maker exceeds manufacturers’ performance requirements.

Permatex Ultra Grey is sensor-safe, low odor, and non-corrosive. Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids. This gasket maker is more flexible and more oil resistant.

Temperature Range -65°F to 500°F (-54°C to 260°C)

Product description

J-B Weld Hi-Temp Red Silicone Gasket Maker & Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist. Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering, is sensor safe and is great for many automotive applications.

• HI TEMP RED SILICONE GASKET MAKER & SEALANT: Is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist
• COUNT ON US: For more than 40 years, our products have earned a loyal following from people who take pride in their work. With each product we innovate, we continue to provide the world's strongest bond for your projects
• EASY TO USE: Curing when the product is exposed to the moisture in air, it forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is sensor safe
• VERSATILE & DEPENDABLE: Ideal for automotive, metal, oil pans, exhaust manifolds, water pumps, timing covers, differential covers, drive housings and oven doors
• DO IT YOURSELF: Big or small, you can DIY it with J-B. Our heavy duty adhesives repair & restore it right the first time. JB Weld delivers the legendary performance of the World's Strongest Bond

User questions & answers

Question:	Can you remove it if needed
Answer:	Believe the instructions are on the back side of the package. You can use acetone or paint thinner to remove.Its great stuff. Works well.
Question:	Can I use it to glue shower mirror to tile in my shower
Answer:	You can but it will probably leach through the mirror coating and appear as mold. Buy mirror mastic.
Question:	Would this be a good product for sealing a crack in a dishwasher liner
Answer:	Yes- I did this, along with filling in a gap on the dishwasher door gasket (which was ultimately replaced). Worked great! Be sure to clean the surface and rough it up a little (a bit of sandpaper, then clean the sandpaper dust off before application of the RTV). Used it a few years ago- is still sealed; all is well.
Question:	My portable convection oven (heats to 500 degrees) glass door fell out of the metal bracket. Would this work to glue it back in
Answer:	Be careful of sealant giving off toxic fumes the first few times you use it. Try heating up the oven 2-3 times before actually placing food inside that could absorb the toxic off-gasses.

Product features

J-B Weld Silicone Sealant & Adhesive

J-B Weld Hi-Temp Red Silicone Gasket Maker & Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550°F or 650° intermittent might exist. Upon curing, which occurs when the product is exposed to the moisture in the air, the silicone forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering, is sensor safe, and is great for many automotive applications.

Product description

BlueDevil Head Gasket Sealer is formulated for the Do-it-Yourself customer who has limited time, or is not mechanically inclined. The 16 Ounce is intended for the customer seeking a single repair on a 4 or 6 cylinder engine.

• Do-It-Yourself Formula
• Easy to Use Pour-n-go
• Used for 4 cylinder and v-6 engines
• Permanently Seals Blown, Cracked or Leaking Head Gaskets

User questions & answers

Question:	where do you pour this stuff in if you have a radiator without cap
Answer:	Correct answer according to directions on bottle is through the top radiator hose. DO NOT pour into the expansion reservoir.
Question:	I have coolant leaking out of the engine from the heads. Will this work for external leaks
Answer:	I used it on my Prius ,with 260000miles on it. Now 291000 without any problems
Question:	How much do I put in my Chevy cobalt
Answer:	Depends on how badly your head gasket is leaking. If it's a small leak my answer would be do not use this product EVER. If your car is absolutely trashed and this it a last ditch effort to keep it running (and if you don't mind that the product may clog your thermostat, radiator and heater core) then use the whole bottle as the directions instruct.I would HIGHLY suggest you read all one star reviews on this product before buying. One of the lowest rated products on Amazon for a reason. Ruined my engine and I had to take them to small claims court to get my damages covered.
Question:	about 30 minutes into the running process the heater started blowing cold. is this normal
Answer:	No it's not normal --- on my jaguar XJ8 -it did more than heater coils and totally plugger up the entire radiator -- water not flowing --- blowing a few hoses -- did something to the thermostat and with all that ( there more detailed from the Jaguar dealership cost to repair $42,000.00 ) Blue Devil's answer -----------------!-----------!-------! ---- $1500.00 and good buy ------ check the web sites you will be amazed at what you find out about these complaints --- and they don't pay for damage repair caused by their product---if I had checked first I never would have used a product from this company

Product description

Permatex Aviation Form-A-Gasket No. 3 Sealant is a slow-drying, non-hardening brush-top sealant approved for use in aviation as well as automotive applications. Gasoline, oil and grease resistant, it has a temperature range of -65 degrees fahrenheit to 400 degrees fahrenheit. Suggested applications include close-fitting machined surfaces, sealing hoses, and solid gaskets. When a chemical gasket is not an option, Permatex offers a wide range of gasket sealants suitable for applications on both import and domestic vehicles of any model year or performance caliber.

• Slow-drying, non-hardening brush-top sealant
• Resists gasoline, oil and grease
• Approved for use in aviation as well as automotive applications
• Suggested Applications: Close-fitting machined surfaces, sealing hoses, solid gaskets
• Temperature range of -65F to 400F

User questions & answers

Question:	would this work for marine freshwater outboard motor such as water pump gasket sealer
Answer:	Unless ur rear view mirror weighs as much as a feather, I would say absolutely NO!! It’s a sealent, gasket type sealent, smear some on the surface where u need it, wait for at least 20-25 minutes, then place both pieces together, an done🤓👍⚡️Docf
Question:	What is the difference between No. 2 and No
Answer:	You bet. Just follow the instructions on the tube precisely.
Question:	My red plastic Moeller marine portable 6 gallon fuel tank has some small gas leaks around the screw on caps - think it would be safe to use
Answer:	chances are there is a bigger problem than just needing "gasket seal" without looking at you car i would not be able to repair it just by a simple comment, if both areas are flat {the manifold and the carburetor} you actually would not even need a sealant. i have been a diesel mechanic for 40 years , this is one of the best products i have used { for 40 years} i am glad i can still find it. i put a coat on the gasket and a coat on the part let semi dry {tacky} then put the gasket on the part and assemble.
Question:	Is this compatible with plastic fittings? I have a diesel storage tank with 3/4" threads that leak a little and I am looking for a sealant
Answer:	Not that I know of and I don't think it would be the best product for something like that. I'd recommend Barge Cement or Aquaseal.

Product features

Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.

Slow-drying, non-hardening brush-top sealant approved for use in aviation as well as automotive applications. Temperature range -65°F to 400°F (-54°C to 204°C); resists gasoline, oil and grease.