J-B Weld KwikWeld is the Quick Setting version of the Original J-B Weld two-part steel reinforced epoxy cold weld system 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 Cures to a dark gray color, is rated at a tensile strength of 2424 PSI and will withstand temperatures up to 300 degree F Epoxy is great for household repairs, automotive, plumbing, marine, crafts and more