J-B Weld® 8271 KwikWeld™ Quick Setting Steel Reinforced Epoxy Twin Tube, 10 OzJ B KwikWeld is a fast setting version of The Original J B Weld two part epoxy cold weld system that provides strong, lasting repairs to metal and multiple other surface types. After mixing, it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled after curing. J B KwikWeld has a 1: 1 mixing ratio, sets in 6 minutes and is fully cured in 4 6 hours. J B KwikWeld cures to a dark grey color, is rated at a tensile strength of 2424