HighHeat by J-B Weld is a kneadable dual-component putty that is specifically designed for Materials on vehicles or in industry, that are subjected to high temperatures, for gluing, repair or new build. HighHeat joins parts permanently without shrinkage. High heat has professional quality and exceeds conventional products many times over. Processing time: 1 hour at room temperature. After 8 hours it can be drilled, milled, sawn, sanded, polished or painted. Can withstand a load of 55 kg/cm² and a temperature of 260 °C. When the gel hardens it turns machine grey. Ideal to use for exhaust system manifolds, mufflers, exhaust pipes, Engine Blocks and for all high temperature work.