How to Apply Fiberglass Resin & Mat to a Surface
Fiberglass mat is added to different applications for reinforcement or as a protective layer. It is waterproof and will not corrode like other materials. Fiberglass is a very strong and durable substance that is applied in layers of dry fiberglass mat bonded together with catalyzed fiberglass resin. The thickness and overall strength of the fiberglass is determined by the amount of mat layers that are used. Fiberglass will bond to almost any surface as long as the surface is thoroughly scuffed.
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Things You'll Need
- Dust mask
- Palm sander
- Coarse-grit sandpaper
- Rags
- Acetone
- Razor knife
- Fiberglass mat
- Fiberglass resin
- Methyl ethyl ketone peroxide (hardener)
- Small bucket
- Stir stick
- Felt roller
- Air roller
Instructions
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1
Wearing a dust mask, scuff the surface that you are applying the fiberglass to using coarse-grit sandpaper and a palm sander. The entire surface should be thoroughly sanded.
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2
Clean the surface using a rag and acetone. Remove any dust or grease from the surface. Any grease or oil left on the surface can cause a poor bond.
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3
Cut the layers of fiberglass mat to the size needed using a razor knife. If there is more that one layer, cut each layer about a quarter-inch smaller than the previous layer. This will give the edges a smooth tapered edge instead of a rough raised edge.
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4
Mix the fiberglass resin with the hardener as directed on the containers. Use a small bucket and a stir stick to thoroughly mix the resin. Determine the amount of resin to use by the size of the surface you are laying up with fiberglass. Using small buckets will allow you to keep refilling the resin mixture as needed, cutting down on waste.
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Wet the surface with the resin mixture using a felt roller. Lay the first layer of mat onto the resin-coated surface. Wet the mat until it has no dry spots left. Roll the air out of the layer using an air roller. Repeat this step for each layer until all layers are down. Let cure until the fiberglass is hard and cool to the touch.
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Tips & Warnings
When working with fiberglass always wear a dust mask.
