The Original ColdWeld two-part epoxy system 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. J-B Weld has a tensile strength of 3960 psi and sets to a hard bond overnight. It can withstand temperatures up to 550 degree F when fully cured.