J-B Weld 8297 10 Pack HighHeat 500 Degree Epoxy Putty - 2 oz

Hand mixable epoxy putty stick specifically for high temperatures Sets in 1 hour, functionally cures in 8 hours Can withstand continuous heat of 400°F (550°F intermittent) Easy-to-use hand mixable putty stick Great for exhaust manifolds, tail pipes, mufflers, engine blocks, machinery and other high temperature projects 3X stronger at high temperatures