PC-Plumbing is a hand moldable putty epoxy designed for quick emergency-type repairs. This epoxy putty is NSF-rated safe for contact with potable water. The plumbing epoxy can be applied to dry and wet surfaces, thus best suited in insulating electrical connections from water. The epoxy putty is efficient in filling abandoned drill holes in the ductwork. Effective in sealing leaks in copper pipes resulting from hard water, this plumbing epoxy is a must-have. This high strength epoxy allows a working time of about 3 minutes and cures for service in just 60 minutes. Fixing the damaged freezing pipes also adds up as an advantage of this epoxy putty. All you have to do with this plumbing epoxy putty is cut, mix, and apply. Since the epoxy putty is pre-measured, it does not require any tools and can be hand mixed.