Seal leaks, fix cracks and holes with the J-B Weld Epoxy Putty. You can use this water weld epoxy putty for plumbing or repairing tubs, shower, drains, fuel tanks, marine, boats, and potable water tanks. It can withstand temperatures of up to 300 deg. F, and prevent the surface from extreme heat and moisture. With a cure time of an hour, it sets hard to form a surface which can be drilled, tapped, filed, sanded, and painted. Offputty is ideal for welding and plumbing tasks. oz. stick for convenient application. Can be used on automotive, ceramic, epoxy putty sticks, fiberglass, metal, and PVC plastic. WATERWELD will plug or seal practically anything that leaks. It will patch holes and cracks, and mend almost anything that is broken. Cures under water, safe for use on lines carrying potable water. We should really call this amazing product "The Miracle Welder," because you can use it to plug holes and make permanent repairs under water and in gas tanks while they're still leaking. No exaggeration this is the best epoxy putty you can use. Modulus of elasticity: 6 X 105 psi. Composition: diglycidyl ether of bisphenol a, novolac epoxy resin, 2,4,6-tris(dimethylamino)methyl phenol. Temperature range: 300 deg F. Material: Epoxy putty. Appearance: White. Used Virtually any combination of iron, steel, copper, aluminum, brass, bronze, pewter, porcelain, ceramic, marble, glass, PVC & ABS, concrete, fiberglass, wood, fabric, paper- just about any porous and non-porous material. Tensile strength: 6000 psi and compression strength: 12,000 psi. Density: 15. 8 lb. /gal. The J-B Weld White Epoxy Putty Underwater Petro Chemical Acid Resistant Water Weld, oz. Stick features a specially formulated epoxy composition with a tensile strength of 900 psi, making it ideal for use in underwater setups.