- Hand-mixable- Steel-reinforced, non-rusting epoxy putty which quickly repairs or rebuilds anything made of metal- After mixing, it forms an industrial-strength polymer compound- Sets in 3-5 minutes and after 60 minutes, can be drilled, tapped, machined, ground, filed, and painted- Cures to a dark gray color- Great for: Automotive, machine parts, exhaust systems, plumbing, stripped threads, rust damage, household repairs, and much more