Cures fast, for typical household maintenance and repairs. Packaged in two tubes, one contains liquid steel. epoxy resin, and the other contains hardener, when mixed together in equal portions, the mixture turns into a compound. Use as an adhesive, laminate, plug, filler, sealant, and electrical insulator. Waterproof, petroleum, chemical and acid resistant. Super strong, non-toxic and safe to use Like metal, J-B KWIK can be formed, drilled, ground, tapped, machined, filled, sanded and painted. It stays pliable for about 2 minutes after mixing, sets in just 4 minutes and cures fully in 4 hours. Bonds to virtually any combination of iron, steel, copper, aluminum, brass, bronze, pewter, porcelain, ceramic, marble, glass, PVC and ABS, concrete, fiberglass, wood, fabric, paper, just about any porous and non-porous material.