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Recently, fiberglass has found its way into a variety of industries, including aviation, making it an essential part of our everyday lives. Andrew Holt / Getty ImagesKey Insights
- To repair a crack in fiberglass, begin by drilling small holes at each end of the crack to stop it from spreading. Use a rotary blade to slightly widen the crack for better epoxy bonding, then fill the crack with fiberglass epoxy resin using a plastic applicator.
- Allow the epoxy to dry for a day before smoothing the area with sandpaper. Optionally, apply a colored gel-coat enamel over the repaired area to make the fix less noticeable.
- Always wear safety gear, such as a face mask and gloves, when handling fiberglass to prevent inhaling glass particles and protect yourself from cuts caused by glass strands.
Glass reinforced plastic (GRP), also known as fiberglass or glass wool, consists of fine polymer fibers woven with glass strands. It is commonly found in numerous products, from aircraft and vehicles to bathtubs and insulation. To strengthen and shape fiberglass, it is combined with bonding materials like epoxy or thermoplastic. However, there are some health risks associated with handling GRP, particularly when it's in the form of glass wool.
When working with GRP, always wear a face mask to avoid inhaling glass particles. It’s also a good idea to wear gloves to prevent cuts from the glass fibers [source: New York City].
Repairing fiberglass is relatively simple. Here’s how to do it.
- Drill a small hole at each end of the crack to stop it from spreading further.
- Inspect the crack. If it’s a fine crack, use a rotary blade (electric or manual) to slightly widen the crack, allowing space for the epoxy resin.
- Clean the crack with a dry rag to ensure it’s free of dirt and moisture. If it's not clean and dry, the epoxy won’t bond properly.
- Fill the crack with fiberglass epoxy resin using a plastic applicator, making sure the crack is fully filled.
- Allow the epoxy to dry for a day. Once dry, smooth the area with sandpaper.
For a more seamless repair, you can apply a colored gel-coat enamel over the area to make the patch less noticeable. You might be able to get a small amount of this from an auto body shop.
[source: Plastic Genius]
