J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz. Hand-mixable epoxy putty stick specifically formulated to plug or seal leaks and patch holes and cracks in almost anything Great for repairing plumbing, fuel tanks, tubs, showers, drains, boats and portable water tanks Sets in 25 minutes, cures in 1 hour to an off-white color with a tensile strength of 900 PSI Once cured it forms a permanent bond and can be drilled, tapped, filed, sanded, painted and will withstand temperatures of up to 300F J-B Weld is proudly made in the USA Fully cures in 20-30 minutes Plugs holes and makes permanent repairs Works on moist surfaces and under water Simple and easy to use