Top 9 High Temp Silicone Sealant – Gasket Sealers

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1. Permatex

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Permatex 81160 High-Temp Red RTV Silicone Gasket, 3 oz

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Permatex #ad - Formulated for hi-temp applications, or heavy-duty use. Replaces almost any cut gasket, and coats pre-cut gaskets to increase reliability. Suggested applications: Valve covers, oil pans, thermostat housings, water pumps, timing covers, transmission pans. Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating. Temperature range of -65F to 650F intermittent.
BrandPermatex #ad
ManufacturerPERMATEX #ad
Height8 Inches
Length1.25 Inches
Weight0.2 Pounds
Width3.81 Inches
Part Number81160
Model81160
WarrantyLIMITED WARRANTY

2. Permatex

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Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 3.35 oz. Tube

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Permatex #ad - Sensor-safe, non-corrosive formula designed for superior adhesion to oily surfaces and long term durability. Suggested applications: Valve covers, timing covers, oil pans, intake manifold end seals, and differential covers. Temperature range -65°f to 500°f -54°C to 260°C intermittent. Retains high flexibility and eliminates the need for pre-formed, paper, pre-cut, rubber or cork gaskets; OEM specified and approved for dealership warranty requirements. Fit type: Universal. Superior resistance to powertrain fluids including engine oil, transmission fluid, gear lube and coolants.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.38 Inches
Weight0.1 Pounds
Width3.81 Inches
Part Number82180
Model82180
WarrantyNA

3. Permatex

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3 oz. Tube, Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker

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Permatex #ad - Temperature range -75F to 700F intermittent. Sensor-safe, low odor, and non-corrosive with superior adhesion. Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets. Most advanced, high temp RTV silicone gasket available. Suggested applications: Exhaust manifolds/headers, timing covers, oil pans, valve covers, water pumps, thermostat housings.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.38 Inches
Weight0.2 Pounds
Width3.81 Inches
Part Number81878
Model81878
WarrantyManufacturer

4. Design Engineering

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Design Engineering 010301 High-Temperature Silicone Coating Spray, Black

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Design Engineering #ad - Recommended for use with DEI non-Titanium exhaust wraps. Protection from abrasions, hot oil spills, and road grime. Lasting protection for any hot surface up to 1500 degrees Fahrenheit. Penetrates, seals, protects and prolongs the lifespan of exhaust wrap. Works equally well on exhaust headers, engine blocks, pipes, and other applications where coatings are required.
BrandDesign Engineering #ad
ManufacturerDesign Engineering #ad
Height7.75 Inches
Length2.75 Inches
Weight0.3 Pounds
Width2.75 Inches
Part Number010301
Model010301
Warrantyn/a

5. 3M

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3 fl oz, 08672, 3M High Temp Black Silicone Gasket

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3M #ad - Flexible rtv sealant/adhesive compound saves material costs vs. Can be used as a gasket alternative when the original gasket is unavailable. Non-corrosive and resistant to water, oil and coolant for long-lasting performance. Hard or custom gaskets. Can be used as a gasket dressing to improve adhesion and seal. Oxygen sensor safe.
Brand3M #ad
Manufacturer3M #ad
Height6.4 Inches
Length1 Inches
Weight0.05 Pounds
Width1.9 Inches
Part Number08672
Model08672
Warranty1 year manufacturer

6. Permatex

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Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, 3.5 oz.

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Permatex #ad - Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids. Oem specified, guaranteed not to leak. Designed specially for high-torque and high vibration applications. Suggested applications: valve covers, timing covers, water pumps, intake manifold end seals, oil pans, thermostat housings. Low odor and non-corrosive formula.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Weight0 Pounds
Width3.81 Inches
Part Number82194
Model82194
WarrantyLIMITED WARRANTY

7. Permatex

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1 Pack, Permatex 27036 Optimum Grey Gasket Maker 3.35 oz

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Permatex #ad - Than Ultra grey. The most advanced, high Temp RTV silicone gasket maker Available. Maximum temperature resistance: -65f to 700f-54 DegreeC to 371 DegreeC intermittent. Maximum vibration resistance, cooling fluids, with outstanding resistance to oils, and shop fluids. Sensor-safe, low odor, and non-corrosive. 15% more flexible than Ultra grey. 40% higher Temp. Includes 2 nozzles.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Weight0.25 Pounds
Width3.81 Inches
Part Number27036
Model27036
WarrantyManufacturer Warranty

8. Rutland Products

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Clear, Rutland 500-Degree RTV High Heat Silicone Seal, 2.7-Ounce Tube

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Rutland Products #ad - Rated to withstand up to 500° F 260° C. Rutland high temperature Silicone is a great solution to your sealant and adhesive needs. Will adhere to most clean surfaces including: glass, plastics, brick, fiberglass, metal, wood, and stone. Forms a tough and flexible seal. Seal fireplace inserts, apply ceramic tiles to your fireplace surround or heat shielding behind your stove, repair solar panels, the uses are endless.
BrandRutland Products #ad
ManufacturerRutland Products #ad
Height7.75 Inches
Length2.13 Inches
Width2.13 Inches
Part Number76CT
Model76CT
WarrantyThis product will be free from defects in material and manufacture for a period of eighteen (18) months from date of manufacture. Rutland fire clay company makes no other warranties including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. User is responsible for determining whether the rutland fire clay company product is fit for a particular purpose and suitable for user’s application. If this rutland fire clay company product is defective within the warranty period stated above, your exclusive remedy and rutland fire clay company’s sole obligation shall be, at rutland fire clay company’s option, to replace the rutland fire clay company product or refund the purchase price of the rutland fire clay company product.

9. Permatex

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3 oz, Permatex 80050 Clear RTV Silicone Adhesive Sealant

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Permatex #ad - Suggested applications: door frames, seams and roofs; not recommended for engine gasket, vinyl tops, windshield installation, or electrical connection applications. Temperature range: -75°f to 400°f -59°C to 204°C. Seals, mends and secures glass, vinyl, repairs, fabric, bonds, metal, plastics, weather stripping and vinyl tops. General purpose, clear RTV indoor/outdoor sealant. Waterproof, durable, weather, and flexible; resists water, and vibration.
BrandPermatex #ad
ManufacturerPermatex #ad
Height0.02 Inches
Length4.48 Inches
Weight0.25 Pounds
Width3.12 Inches
Part Number80050
Model80050
WarrantyManufacturer Warranty