Wood Filler Window Sill 'link' -

Water-based fillers absorb moisture and fail quickly outdoors.

Start with to level large filler areas, then 120-grit , then 220-grit for a finish ready for paint. Sand flush with the surrounding wood, not hollowing the center. Wipe away dust. wood filler window sill

Small nail holes or hairline cracks on the interior side of the sill. Step-by-Step Repair Guide 1. Prep the Surface and structural. Best for: Deep rot

These are the gold standard for exterior repairs. They consist of a resin and a hardener that you mix together. Does not shrink, waterproof, and structural. Best for: Deep rot, large holes, and structural corners. 2. High-Performance Wood Fillers (Polyester) wood filler window sill