J-B Weld 8297 HighHeat 550 Degree Epoxy Putty Stick - 2 oz. Hand mixable epoxy putty stick specifically formulated to bond and repair materials that will be exposed to high temperatures Great for exhaust manifolds, tail pipes, mufflers, engine blocks, machinery and other high temperature projects Sets in 1 hour at room temperature, functionally cures in 8 hours and withstands continuous heat of 400F (550F intermittent) Once cured, it forms a permanent bond and can be drilled, tapped, machined, ground and filed J-B Weld is proudly made in the USA 3 times stronger at high temperatures Withstands continuous heat up to 450 degrees Fahrenheit, and intermittent heat up to 500 degrees Fahrenheit Strength of 800 PSI at room temperature and 600 PSI at 400 degrees Fahrenheit Perfect for tail pipes, mufflers, machinery, engine blocks, and exhaust manifolds Special Shipping Information: This item cannot be returned and has additional shipping restrictions