J-B Weld KwikWeld Professional is a professional-sized version of our fast-setting KwikWeld two-part epoxy cold weld system. It 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. KwikWeld has a 1:1 mixing ratio, sets in 6 minutes and is fully cured in 4-6 hours. KwikWeld cures to a dark grey colour, is rated at a tensile strength of 3127 PSI and will withstand temperatures up to 150 degrees Celsius.