How to Repair Fiberglass


Fiberglass is a very strong substance that manufacterers use to make various products and things. Boats, windows and even cars can be made out of fiberglass. Fiberglass is also subject to cracking over time. You can fix the crack or hole with relative ease. Here is how you can repair fiberglass. Read on for more information.

Procedure:

Necessary Items:

  • Fiberglass Fabric
  • Tape
  • Razor
  • Dewaxing Solvent
  • Grinder
  • Resin Roller

How to Repair Fiberglass Repair Fiberglass

  • Gelcoat
  • Fiberglass Max
  • Polyester Resin
  • Methyl Ethyl Ketone Peroxide

Step 1

Locate the broken section of the fiberglass. If you can’t easily see the broken part, tap along the surface of the fiberglass with something hard. When fiberglass is damaged it sounds dull.

Step 2

Begin to repair the fiberglass from the interior. Beginning on the interior contributes to smooth end results on the exterior.

Step 3

Use a saw to remove the affected area. Then, taper the hole with a grinder. The taper will create more surface area for you to work on. This also helps ensure the repair is successful.

Step 4

Use the dewaxing solution to strip the exterior. This will also create a better surface for the fresh fiberglass to adhere to.

Step 5

Use wax paste and apply it around the hole. This protects the surface from resin stains.

Step 6

Attach the waxed backing to the lower area of the hole. This backing will create a hard work surface to plug the hole.

Step 7

When you begin to start to fix the fiberglass, smear the waxed backing with a gelcoat. Gelcoat is also a resin. It has some color to it and you can match which will suit your needs. The gelcoat is your smooth, glossy, finish.

Step 8

Slice the mat and fiberglass fabric to the same size as the hole. Install two later of mat first, then add the fabric.  Now, switch between fabric and fiberglass mat. Don’t use too much mat and fabric because your bond will be less strong.

Step 9

Plug the hole in the fiberglassusing epoxy or resin. If you’re using a polyester resin, you’ll also need to use a laminating resin, too. A laminating resin helps strengthen the bond of your fiberglass.

Step 10

Apply methyl ethyl ketone peroxide to made the resin turn hard. Use the maker’s instructions to determine how much resin to you. Apply it with a clean resin roller. Smooth out all air and lumps.

Step 11

Take off the wax backing and patch any inconsistencies with gelcoat. Sand the entire affected area and polish until you are satisfied. Now, you are all finished repairing the fiberglass.

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Related posts:

  1. How to Repair a Fiberglass Hull on a Boat
  2. How to Repair Cracks in Fiberglass Boats
  3. How to Repair a Boat’s Fiberglass Floor
  4. How to Build a Fiberglass Box
  5. How to Make a Fiberglass Motorcycle Fender

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About the Author: Jason Prickett loves to write about home maintenance and stuff you can do yourself instead of hiring any professional. His step by step guides will assist you in completing your home maintenance tasks.

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