Epoxy putty is a modern improvement in wood restoration. It’s used mainly — but not exclusively — to get exterior wood repair when rot appears on casings, trim, decking or anywhere else where water has penetrated into the wood. Epoxy resin comes in two parts: a resin and hardener. A third part, the bonding agent, is employed as a precursor to this program of the resin after it’s combined. Epoxy resin is relatively permanent and, after program, can be shaped to match the profile of the existing wood. The repair is nearly impossible to detect after it’s painted.
Scrape off old paint around the broken or damaged area by means of a wire brush. Scrape and chip out any large debris and balls from the rotted area working with a screwdriver.
Install a grinding piece to a rotary tool. Grind out any remaining soft wood working with the rotary tool. When the bit strikes hard wood and the rot or delicate wood is gone, then the pit is ready for the bonding agent. The cavity can be irregular with differing levels or seams.
Use the liquid bonding agent to the cavity by means of a paintbrush. Apply it generously to soak the inside of the cavity completely.
Mix the two-part resin with a putty knife in line with the manufacturer’s directions. It might be tagged as part one and part two, or resin and hardener, depending on manufacturer. Mix the two parts with a flat piece of plywood or scrap wood.
Use the mixed resin to the cavity with the putty knife. Use it just like a trowel to push the resin into the recesses, pits and shapes of the cavity. Complete the program by smoothing and shaping the resin flush with the profile of the current wood working with the putty knife. It’s fine if the puttylike resin is raised up slightly higher than the surface of the wood. Permit the resin to dry overnight.
Shape and mold the hardened resin to match the profile of the existing wood working with a medium-grit file. Fold a sheet of 100-grit sandpaper into thirds and use the sharp edge just like a knife to sand inside tight corners. Roll the seams around a dowel to sand within curved profile lines. Sand the resin smooth utilizing 120-grit sandpaper. Apply paint as needed.