Hand kneadable, steel filled epoxy putty. It mixes easily in about one minute. Within 5 minutes of mixing, the putty will begin to get warm as the epoxy cures. Uses - after mixing, it can be used to repair tanks, drums, castings, ducts, valves, pipes and tools. It can be used wherever metal is missing, dented, broken, or rusted away. Can be sanded, drilled, sawed, and painted after 30 minutes.