Maximum Oil Resistance
Temperature Resistant up to 500° F
Low Odor
Sensor Safe
Set Time
1 Hour
Cure Color
Use On
  • Automotive
  • Metal
  • Silicone Sealants & Gasket Makers
  • And More

Water Pump & Thermostat Housing

J-B Weld Water Pump & Thermostat Housing Gasket Maker & Sealant is a specially designed RTV (Room Temperature Vulcanized) Silicone gasketing material for use in mechanical assemblies. Curing occurs with exposure to moisture in the air, forming a tough, waterproof, petroleum and weather resistant gasket and seal on most surfaces. This product is grey in color, will not shrink or crack, is sensor safe, has good temperature resistance up to 500º F intermittent and is great for many automotive applications.

Great For
  • Oil Pans
  • Valve Covers
  • Transmission Pans
  • Timing Gear Covers

Made in the USA US flag

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Prepare: For best results, clean and dry surface area
Apply: Apply even, continuous ¼ inch bead of Silicone to one surface area. Surround all bolt holes with Silicone.
Assemble: Reconnect parts while Silicone is wet.
Secure: Hand tighten until Silicone begins to squeeze out.
Dry: Allow drying for 1 hour and then tighten an additional ½ turn.
Finish: Scrape or cut away excess cured sealant. Silicone will fully cure in 24 hours.