The William H. Harvey Company 4 oz. Epoxy Putty Stick is ideal for plumbing, electrical, auto and home repairs. The stick is designed to plug, seal, patch and mend most items. Not recommended for use with polyethylene or polypropylene.
I tried to repair a water line with William H. Harvey Plumbers Epoxy Putty. I sanded the area around the lead to a bright copper, mixed it for ~2 min. and applied to the hole. IThe putty took a lot more then 20 min. to get hard After it was hard I turned on the water and it stilled leaked. When I got a real Plumber in to replace the section I had even got some of the putty into the hole. This product it NOT good for water lines.