J-B Weld WaterWeld is an incredibly strong, waterproof epoxy putty, perfect for sealing leaks, holes, and cracks. It forms a permanent bond with most clean and dry surfaces and can even bond underwater when consistent pressure is applied until fully set. Ideal for plumbing, tubs, showers, drains, pools, spas, boats, and potable water tanks. WaterWeld has a 25-minute work life, sets in 15-25 minutes, and fully cures in one hour. Once cured, it can be drilled, tapped, filed, and sanded, and withstands 4370 PSI tensile force, 500 PSI water pressure, and temperatures up to 250°F. It cures to an off-white color and is NSF certified safe for drinking water.

• Great for plumbing & irrigation; marine & boats; tubs, showers & drains; potable water tanks.
• Works best on rigid plastics and fiberglass. Good for all metals, stone, and concrete.
• Holds 10x typical household water pressure.
• Easy to use hand-mixable epoxy putty. Molds to fit and shape anywhere. Seals and fills cracks and holes.
• Sets fast. 25 minutes set time. 1 hour cure time.
• Extremely versatile. Bonds to many surfaces. Works indoor or outdoor.
• Great for tubs, showers and drains
• Waterproof