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A Step by Step Guide on How to Use a Fiberglass Repair Kit

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A Step by Step Guide on How to Use a Fiberglass Repair Kit
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Fiberglass is an adamant material, but it may also develop cracks or holes under rough conditions or if face any accident. There are several methods for repairing it, but using a fiberglass repair kit is probably the easiest solution. There’s no need to have any prior experience because a kit includes all the materials and directions required for a DIY project.

Repair Fiberglass

To know its use, you first have to about the materials come with a standard kit and the additional items you may need for repairing the crack or hole.

Materials in a Fiberglass Repair Kit

  • Fiberglass resin
  • Hardener
  • Plastic spreader
  • Fiberglass cloth
  • Mixing stick
  • Mixing tray

fiberglass repair kit

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Additional Items Required for the Project

  • Acetone or lacquer thinner
  • Sandpaper 80 and 180 grit
  • Sanding block
  • Measuring cup
  • A paintbrush
  • Rubber gloves
  • Scissors

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How to use a fiberglass repair kit to fix a damaged area

Let’s take a look at our fiberglass repair guide with the step by step instructions:

Step 1: Cleaning the damaged area

Use acetone to clean the damaged area. If you don’t have it, soapy water will also be useful for removing the dirt, oil, grease, and other ingredients. Let it air-dry completely or use a piece of dry cloth to wipe the area.

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Step 2: Sanding the damaged area

Use the Sandpaper 80 grit to sand the damaged area. It will remove all the rust, paint, primer, and gel-coat. Sand the other side of the damaged spot too because repairing both sides will strengthen the surface. Clean the area again with acetone or soapy water.

Step 3: Making resin and hardener mixture

Cut several pieces of fiberglass cloth to one-inch larger than the cracked or holed area. Then mix the resin with the hardener in the mixing tray. Blend in small amounts and remember that the working life of the mixture will be nearly 8 to 12 minutes at 75°F. You have to use ten drops of hardener for one ounce of resin.

Step 4: Applying a coat of mixture

Use the paintbrush to apply a coat of mixed resin on the damaged area. The resin should cover the area that extends 2 to 3 inches beyond repair. Then, place a piece of fiberglass cloth onto the damaged spot and saturate it with the mixed resin. Keep applying layers of cloth pieces and resin until the area is repaired completely. Follow the same procedure for the both sides.

fiberglass repair kit

Step 5: Drying then sanding the damaged area

Let the area dry properly. The curing will be better if the temperature of the place remains at 75°F. After that, sand the area with Sandpaper 80 grit. You can use a body filler at this stage to smoothen the small curves.

Step 6: Sanding the contour of the repaired area

Use the Sandpaper 180 grit on the contour of the repaired area so that it blends with the rest of the surface.

Check out this video for more details about how to use fiberglass repair kit

Now, your car is ready for the paint job. While using the fiberglass repair kit, always remember to use hand gloves while touching the fiberglass cloth and resin mixture. Besides, dump the unused resin because putting it back into the container will spoil the rest of it.

Next week, we will show you more car maintenance tips like How to replace Windshield or Easy ways to unlock your car, thus, don’t forget to follow CAR FROM JAPAN to read more useful car information.

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