How to Cover Holes in Fiberglass
- 1). Sand the damaged area lightly with a medium-grit sandpaper to remove any rough edges from the fiberglass.
- 2). Clean the area around the hole in the fiberglass with alcohol on a lint-free cloth. It's important to remove any residue from soap, hair products or bath oils. This will help assure that the patch adheres completely to cover the hole in the fiberglass .
- 3). Lay a thick piece of cardboard or other thick disposable material to protect the area where the chemicals will be mixed. Put on the gloves before mixing the fiberglass bonding compound.
- 4). Mix the ingredients according to the manufacturer's directions in a disposable cup or bowl following the color guide given so the product will match the color of the fiberglass. Mix the resin compound as thick as possible for vertical repairs to lessen the chance of runs.
- 5). Lay the fiberglass patch from the kit over the hole. Use the putty knife or craft stick to spread the bonding compound across the surface of the patch. Add it thick enough to thoroughly cover the cloth patch and let it overlap the patch on all sides.
- 6). Allow the fiberglass bonding compound to dry completely according to the manufacturer's recommendation from 12 to 24 hours.
- 7). Sand the fiberglass patch with the fine-grit sandpaper. Sand only enough to smooth the surface but not enough to expose the patch.