How to Repair Spider Cracks in Gelcoat on Your Boat

Learning how to repair spider cracks in gelcoat is one of those skills that every boat owner eventually needs to tackle to keep their vessel looking sharp. You know the ones—those tiny, annoying hairline fractures that look like a spider web decided to move into your hull. While they usually don't mean your boat is about to sink, they're a total eyesore and can eventually let moisture into the fiberglass laminate if you ignore them for too long. ...

April 29, 2026 · 7 min · Carole Agathe