Quick Fix Epoxy Putty is a hand-mixable adhesive sealant developed to work with most surfaces. Once mixed, the product hardens in 5 minutes and cures in 1-hour. Once the epoxy putty has cured it can be drilled, filed, tapped, sanded and painted. Quick Fix Epoxy Putty is WATERPROOF! Ideal to use underwater in swimming pools, fish tanks or for common plumbing repairs. Epoxy Putty can also be used to fabricate parts.