How to Repair Fiberglass

Fix boats, personal watercraft, even truck toppers. Do it yourself and save thousands.

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Heat gun
  • Safety glasses
  • Sanding block
  • Rotary tool

You'll also need a variable speed buffer, wool buffing pad, chemical-resistant gloves, respirator and a burr-nose grinder bit.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • Powdered fiberglass filler
  • Gel coat
  • Gel coat reducer
  • Disposable spray gun
  • Acetone
  • Buffing compound
  • Wax
  • Sandpaper, 1200-, 800-, 600-, 240-, 150- and 80-grit

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