10 Best Gasket Sealant in 2022 – [Top Picks]

We are reader-supported. When you buy through links on our website, we may earn an affiliate percentage.

We’ve got you covered for the best gasket sealant! We did hours of research and analyzed countless online databases, forums, and real user reviews to find the highest-quality products available today.

Our top picks are of high quality and have received high ratings from users so that you can be confident in their abilities! So, let’s check out the top picks.

34% OffEDITOR'S CHOICE
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 3.35 oz. Tube
  • 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
  • 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

Top 10 Gasket Sealant – [Highly Rated]


10 Best Gasket Sealant – [Editor’s Recommendations]

34% OffOUR #1 PICK
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 3.35 oz. Tube
  • 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
  • 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
16% OffOUR #2 PICK
Permatex 80062 High Tack Gasket Sealant, 4 oz.
  • 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
OUR #3 PICK
J-B Weld 31314 High Temperature RTV Silicone Gasket Maker and Sealant - Red - 3 oz.
  • 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
OUR #4 PICK
Permatex 80008 Form-A-Gasket #1 Sealant, 3 oz.
  • Fast-drying, hard-setting sealant designed for sealing rigid materials and flanges
  • Patches holes and joints where permanent assembly is desired
  • Resists common auto and shop fluids including fuels
  • Temperature Range: -65°F to 400°F (-54°C to 204°C)
  • Suggested Applications: Freeze plugs, threaded connections, and manifold gaskets
OUR #5 PICK
Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.
  • 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
OUR #6 PICK
Permatex 22071 Water Pump and Thermostat RTV Silicone Gasket, 0.5 oz., 0.5 Ounce , blue
  • Sensor-safe, noncorrosive RTV silicone gasket material formulated specifically for water pumps and thermostat housings
  • Highest water-glycol resistance available in an RTV silicone
  • Superior adhesion and flexibility; can be used as a gasket maker or dressing
  • Temperature Range: -65°F to 500°F (-54°C to 260°C) intermittent
  • Suggested Applications: Water pump and thermostat housings
25% OffOUR #7 PICK
Permatex 81160 High-Temp Red RTV Silicone Gasket, 3 oz
  • 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
OUR #8 PICK
K&W 401612 Copper Coat Aerosol - 9 Wt Oz High Tack Sealant for Metallic, Hard Surfaces, Rubber Gaskets | Automotive Adhesives & Sealants
  • K&W SEALANTS & SOLUTIONS: From head gaskets and engine blocks to automatic transmissions and power steering, K&W products are made to stop leakage in aging vehicles. Our sealants provide an effective alternative to costly repairs and parts replacements.
  • AEROSOL GASKET SEALANT: Formulated to prevent compression loss on premium gaskets, Copper Coat goes on tacky to hold gaskets firmly in place. It contains copper for long lasting and high temperature applications.
  • APPLICATION RANGE: Copper Coat is ideal for use on automatic transmissions, cover plates, diesel heads, high compression engines, hi-speed turbine superchargers, and hydraulic pumps.
  • SAFE HANDLING: Highly flammable gasket sealing compound must be stored in a well-ventilated place away from direct heat. Wear appropriate personal protective equipment such as safety glasses and gloves.
  • PRODUCT SPECIFICATIONS: Copper Coat is available in 9 wt oz fill.
OUR #9 PICK
apel High Performance RTV High-Temp Silicone Gasket Maker and Sealant Heat Resistant from 104ºF to 572ºF Red, 10.2 oz.
  • RTV HIGH-TEMP SILICONE : Is a gasket maker and sealant, heat resistant RTV (Room Temperature Vulcanized) Silicone, used with sealing purposes in heating systems, automobiles, other vehicles especially in sealing and adhesion works of the motor components.
  • PHYSICAL STRAIN : High Temperature & Heat Resistant from 104ºF to 572ºF. It is resistant up to 482 ºF when exposed continuously and up to 572 ºF when exposed temporarily heat.
  • SUGGESTED APPLICATIONS: It can be easily used in sealing the stoves, applications where high heat resistance is required such as heating devices, pumps and motors, chimneys, hot water boilers, electric home appliances, rear main bearing cap split line, automatic transmission pan, case halves and inside cover, damper keyway sealing, differential cover, manifolds, oil pan corner seals, thermostat, transmission pan, valve cover gasket, water pump cover gasket, exhaust manifold & connection points.
  • PRODUCT FEATURES : It is cured acetoxy system and when cured formation of a flexible silicone gasket can be observed. Excellent bonding to wide range of applications, resists cracking, shrinking and migration caused by thermal cycling, resistance to oil, water & toxic chemicals, pressure resistant, makes air tight & leak proof gaskets in seconds.
  • EASY TO USE : Waterproof, gasket & seal on most surfaces. Forms to any shape instantly, it will not shrink or crack, high resistance and fast curing properties. It is very resistant to the physical strain after being cured. Superior adhesion & flexibility.
OUR #10 PICK
Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.
  • Hard setting, economical sealant
  • Formulated to lubricate under the most adverse brake conditions
  • Seals all common gasketing materials
  • Resists diesel fuels and most auto shop fluids
  • Designed for temperature range -65 F to 350 F

How to Choose the Best Gasket Sealant?

When it comes to purchasing gasket sealant, there are a lot of factors to consider. With so many choices on the market, it can be tough to decide what to buy. However, by keeping the following factors in mind, you can make your next purchase with confidence.

1. Price

One of the most important factors to consider when purchasing gasket sealant is the price. Not only should you consider the cost of the product, but also the cost of shipping and handling. It is important to compare prices between different retailers so that you can find the best deal.

2. Features

When looking at gasket sealant, it is important to read the description carefully. This will give you a good idea of what the product is and how it works. It is also important to consider the features of the product. Some products have more features than others, and these features may be important to you.

3. Reviews

It is always helpful to read reviews before you buy gasket sealant. This will give you an idea of how other people have used the product and what their thoughts are. Additionally, reviews can help you make a more informed decision about the gasket sealant.

4. Comparisons

If you are looking for a specific gasket sealant, it is helpful to look at similar products to see if they are cheaper or better quality. This can help you make a decision without having to spend a lot of time researching the matter. It is also helpful to talk to friends and family members who may have found a good deal on a certain product.

5. Brands

One of the most important factors to consider when purchasing gasket sealant is the manufacturer. Make sure you are buying from a reputable brand that you can trust. There are a lot of companies that make low quality products. They might not last as long as you would like, or they might not function as they are supposed to.

6. Warranty

When purchasing gasket sealant, it is always important to consider the warranty. This will give you peace of mind in case something goes wrong with the product. If the product has a warranty, make sure to read the terms and conditions carefully.


Final Words

We hope you found our research on the best gasket sealant helpful. If you have any questions, please don’t hesitate to contact us, and we’ll be happy to answer them.

34% OffEDITOR'S CHOICE
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 3.35 oz. Tube
  • 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
  • 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