Features and Benefits:

• J-B Weld Ultimate Copper High Temperature RTV Silicone Gasket Maker and Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material that is 3 times more oil resistant than conventional silicones and designed to resist the high operating temperatures of turbocharged or high-performance engines. Ultimate Copper is effective in temperatures from -75°F to 700°F intermittent. 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.


Sensor safe RTV silicone gasketing material designed for use on high temperature turbocharged or high-performance engines. 3 times more oil resistant than conventional silicones. Temperature range of -75°F to 700°F intermittent. Sets in 1 hour and will not shrink or crack.