J-B Weld Wood Restore Premium Epoxy Putty – Repair Compound is a hand mixable epoxy putty specially formulated to repair and rebuild wood quickly and easily. When applied it adds structural strength to areas of damaged or rotted wood. It can be used to fill, build, reinforce or bond wood surfaces. After mixing, it forms a polymer compound that cures to the same density as wood. It may be used for exterior or interior applications; contains no solvents; will not rot, shrink, crack or pull away. After 60 minutes, it can be sanded, tapped, machined, dripped, filed and painted.