J-B Weld 8271 KwikWeld Professional Size Steel Reinforced Epoxy Twin Pack - 10 oz. J-B Weld is The Original Cold Weld two-part epoxy system that provides strong, lasting repairs to metal and multiple surfaces. Mixed at a ratio of 1:1, it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled after curing. At room temperature, J-B Weld sets in 4-6 hours to a dark grey color. A full cure is reached in 15-24 hours. J-B Weld has a tensile strength of 3960 PSI and sets to a hard bond overnight. It can withstand temperatures up to 550ºF when fully cured. Features J-B Weld kwikweld pro size: Professional 5 OZ Tubes of J-B Weld KwikWeld. KwikWeld is a fast setting version of The Original Cold Weld two-part epoxy system that provides strong, lasting repairs to multiple surfaces. Perfect for DIY Cure and set time: After mixing the tubes at a 1: 1 ratio, it takes 6 minutes to set and 4-6 hours to cure. Once cured, KwikWeld can be tapped, filled, sanded, molded and drilled. J-B Weld KwikWeld?s set and cure color is dark grey Versatile and dependable: J-B Weld KwikWeld is steel reinforced, has a tensile strength of 3127 PSI and can withstand temperatures up to 230 degrees Fahrenheit (110 degrees Celsius). When fully cured, KwikWeld is waterproof Surface applications: Metal, Plastic PVC, Wood, Concrete, Ceramic Tile and Fiberglass