Devcon Plastic Steel 5 Minute Putty (SF) is a fast-curing, steel-filled epoxy designed for rapid repairs on metal surfaces, curing in roughly one hour. It is primarily used to rebuild worn machinery, patch castings, repair pipes and tanks, and restore bearing journals, even at low temperatures (\(40^{\circ }\text{F}\) or \(4^{\circ }\text{C}\)).