J-B Weld 32925 Ultimate Copper High Temperature RTV Silicone Gasket Maker and Sealant - 9.5 oz. 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 -75F to 700F intermittent Sets in 1 hour and will not shrink or crack J-B Weld is proudly made in the USA