Rotted Window Sill Repair [new]

Sand the patch flat and flush with the surrounding wood using 80-grit sandpaper.

Standard paint won’t stick to epoxy filler. You must use a high-quality first. Then apply two coats of exterior acrylic paint. Do not skip the primer—it prevents future UV damage to the epoxy. rotted window sill repair

You spot it during a spring cleaning—dark, spongy wood flaking off the ledge beneath your window. The paint is bubbling, and a screwdriver sinks in like it’s butter. You’ve got a rotted window sill. Sand the patch flat and flush with the

Apply the liberally to the remaining exposed area. It soaks into the fibers, polymerizing the rot. Let it cure as directed (usually 2–4 hours). This stops the rot from spreading. rotted window sill repair