Formulated to allow for repairs to iron,steel and metal in high temperature enivornments(1000f/537C).When fully cured,this metallic compound can be drilled,machined or sanded.It is great repairing cracks,small gaps,seam connections or holes in exhaust manifolds,pipe connections,mufflers,catalyric converters,outdoor grills,fire boxes,gas and commercial furnaces and water heaters.This product is water based and non flammable.