J-B Weld 8281 Professional Size Steel Reinforced Epoxy Twin Pack - 10 oz. The Original J-B Weld two-part epoxy cold weld system in a 10 oz. pro size Great for household repairs, automotive projects, plumbing and marine applications, crafts and more Sets in 4-6 hours at room temperature and cures dark grey in 15-24 hours and rated at a tensile strength of 3960 PSI Once cured it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled and will withstand temperatures of up to 550 degrees Fahrenheit J-B Weld is proudly made in the USA