Materials: Bonds steel, cast iron, aluminum, copper, brass, bronze, magnesium, tin, and lead in any combination.Use Cases: Ideal for sealing cracks, smoothing cavities, restoring damaged internal or external screw threads, and repairing automotive or industrial machinery components.Use: Fast and reliable bonding, filling cracks, and repairing surfaces or threads on steel, aluminum, iron, and other metal alloys.Curing Time: Hardens in about 3 to 5 minutes and fully cures within a few hours.