PC-Plumbing Epoxy Putty is for pipes. Use PC-Plumbing to stop leaks in less than 60 minutes. Pre-measured and easy to use and 2 part epoxy putty does not require tools. Hand mix and apply. NSF approved for plumbing repairs and for contact with potable water supply pipes. Size: 1.3 Oz. Color: Gray Set Time: Cure Time: 20 Min. Strength: