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 permanant 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 colour. A full cure is reached in 15-24 hours. J-B Weld has a tensile strength of 5020 PSI and sets to a hard bond overnight. It can withstand temperatures of up to 288*C (550.4*F) when fully cured.