Fiberglass Surfboard Repair

Most of the surfboards that are used today are designed to be lightweight so that they are able to glide smoothly over the surface of the water. They are built with foam or polyurethane and then given a resin that is molded onto it. Afterwards it is then laminated with resin and fiberglass cloth which helps to keep the whole board strong.

In between being crushed by waves and thrown over the surface of the water damage is likely to happen. When this happens we need to find a way for it to be repaired quickly and effectively so that we are able to get back out on the water and catch the next big wave.


  • Clean the damaged area and make sure it is completely dry. Sand down the fibers that are sticking up and place a rough sand around the area. This will help the resin to bond with it.
  • Wipe the area down the rubbing alcohol to remove the dust particles and to keep the surface of the board clean.
  • Combine the resin and hardener according to the instructions. Use a special acid brush to apply the resin. Before you do this though make sure it is the right color of the board.
  • Cut out three varying lengths of fiberglass cloth making sure to round the corners. All three patches must be slightly smaller then the original break and smaller then each other.
  • Apply a thin later of resin and then place the pieces of fiberglass cloth onto it. Blot it with the acid brush until thoroughly saturated – but not soaked.
  • Set down wax paper or cellophane over this. Make sure there are no air bubbles or wrinkles.
  • Let it dry for at least twenty four hours in a warm area – but not in the sunlight.
  • Sand down the repair using 100 grit sandpaper. Work your way up to using 250 grit and end off with 400 wet sand. Once it is completely smooth you are done with the repair and ready to get back in the water.