Set Time
1 Hour
Temperature Resistant up to 650° F
Cure Color
Use On
  • Automotive
  • Metal
  • Silicone Sealants & Gasket Makers
  • And More

Hi-Temp Red Silicone

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.

Great For
  • Oil Pans
  • Valve Covers
  • Exhaust Manifolds
  • Water Pumps
  • Timing Covers
  • Differential Covers
  • Drive Housing
  • Oven Doors
Made in the USA US flag

Related Items


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.