J-B Weld 8277 Epoxy Putty, White, Solid, 2 oz, Stick Pack

WaterWeld™ will plug or seal leaks and patch holes and cracks in almost anything. Ideal for repairing plumbing, fuel tanks, tub and shower, drains, pool and spa, boats and potable water tanks, setup occurs even under water. After curing, it can be drilled, tapped, filed, sanded and painted. WaterWeld™ has a set time of 15 to 25 mins and sets hard in 1 hr. WaterWeld™ cures to an off-white color, is rated at a tensile strength of 900 psi and will withstand temperatures up to 300 deg F.