The "High Heat" hand mixable epoxy putty stick from J-B Weld is used to bond and repair materials that will be exposed to high temperatures in automotive and industrial maintenance applications. Ideal for exhaust manifolds, tail pipes, mufflers, engine blocks, ductworks, machinery and high temperature projects. It sets in 1 hour at room temperature and after 8 hours, it can be drilled, tapped, machined, filled and painted. It has a tensile strength of 800 PSI and cures in a machine grey color. It is also able to withstand continuous heat exposure of 400 Fahrenheit degrees and intermittent heat exposure to 550 Fahrenheit degrees. It comes in a 57 g red format.