Top 9 RTV High Temp – Gasket Sealers

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1. Permatex

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

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Permatex #ad - Formulated for hi-temp applications, or heavy-duty use. Temperature range of -65F to 650F intermittent. Suggested applications: Valve covers, oil pans, water pumps, timing covers, thermostat housings, transmission pans. 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.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Weight0.2 Pounds
Width3.81 Inches
Part Number81160
Model81160
WarrantyLimited Manufacturer

2. Permatex

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

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

3. J-B Weld

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10.3 oz., J-B Weld 31914 Red High Temperature RTV Silicone Gasket Maker and Sealant

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J-B Weld #ad - Our heavy duty adhesives repair & restore it right the first time. It will not shrink or crack, it forms a tough, resists weathering and is sensor safe. Choose the product pros trust for your project.

Easy to use: curing when the product is exposed to the moisture in air, waterproof seal on most surfaces. Jb weld delivers the legendary performance of the World's Strongest Bond. What the professionals use: builders, mechanics & repair pros know our products bond strong to a variety of surfaces in even the toughest environments. Versatile & dependable: ideal for automotive, oil pans, timing covers, metal, water pumps, differential covers, exhaust manifolds, drive housings and oven doors.

Do it yourself: big or small, you can diy it with j-b. Hi temp silicone gasket maker & sealant: is an rtv silicone gasketing material, designed for use in mechanical assemblies where continuous temperatures up to 550º F or 650º F intermittent exist.
BrandJ-B Weld #ad
ManufacturerJBWeld #ad
Height5 Inches
Length11 Inches
Width9 Inches
Part Number31914
Model31914

4. 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 - Temperature range -65°f to 500°f -54°C to 260°C intermittent. Fit type: Universal. Suggested applications: Valve covers, timing covers, oil pans, intake manifold end seals, and differential covers. 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, paper, pre-cut, rubber or cork gaskets; OEM specified and approved for dealership warranty requirements.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.38 Inches
Weight0.1 Pounds
Width3.81 Inches
Part Number82180
Model82180

5. Permatex

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Permatex 27036 Optimum Grey Gasket Maker 3.35 oz, 1 Pack

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

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 - Low odor and non-corrosive formula. Oem specified, guaranteed not to leak. Designed specially for high-torque and high vibration applications. Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids. Suggested applications: valve covers, timing covers, intake manifold end seals, oil pans, water pumps, thermostat housings.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Weight0.26 Pounds
Width3.81 Inches
Part Number82194
Model82194
WarrantyManufacturer

7. Permatex

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Permatex 27038 Optimum Red High Temperature Gasket Maker 3.35 oz

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Permatex #ad - Non-flammable, non-toxic. Top job applications: header, slip-fit exhaust parts, manifold, turbocharge and withstands up to 750°F 399°C intermittent. Can be used as a gasket maker or dressing and meets performance specs of OE silicone gaskets. Maximum temperature performance. Oem specified, sensor-safe, low odor, non-corrosive.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Width3.81 Inches
Part Number27038
Model27038

8. J-B Weld

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3 oz., Copper, J-B Weld 32325 Ultimate Copper High Temperature RTV Silicone Gasket Maker and Sealant

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J-B Weld #ad - Flash point: 300000 degrees_celsius. What the professionals use: builders, mechanics & repair pros know our products bond strong to a variety of surfaces in even the toughest environments. Choose the product pros trust for your project.

Versatile & dependable: ideal for automotive, oil pans, timing covers, exhaust manifolds, water pumps, metal, differential covers, drive housings and oven doors. It will not shrink or crack, it forms a tough, resists weathering and is sensor safe. Our heavy duty adhesives repair & restore it right the first time. Do it yourself: big or small, you can diy it with j-b.

Hi temp silicone gasket maker & sealant: is an rtv silicone gasketing material, designed for use in mechanical assemblies where continuous temperatures up to 550º F or 650º F intermittent exist. Jb weld delivers the legendary performance of the World's Strongest Bond. Easy to use: curing when the product is exposed to the moisture in air, waterproof seal on most surfaces.
BrandJ-B Weld #ad
ManufacturerJBWeld #ad
Height6 Inches
Length6 Inches
Weight0.09 Pounds
Width9 Inches
Part Number32325
Model32325
WarrantyNo Warranty

9. Permatex

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Permatex 81422 Sensor-Safe High-Temp RTV Silicone Gasket Maker, 3 oz.

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Permatex #ad - Suggested applications: valve covers, water pumps, timing covers, oil pans, thermostat housings and transmission pans. First generation 1970-1980 gasket maker. Resistant to auto and shop fluids. Specially formulated for engines equipped with oxygen sensors. Temperature range: -65F to 650F intermittent.
BrandPermatex #ad
ManufacturerPermatex #ad
Height8 Inches
Length1.25 Inches
Weight0.33 Pounds
Width3.81 Inches
Part Number81422
Model81422