How to Mix Fiberglass

Fiberglass is a product that is made up of woven glass cloth sandwiched between layers of polyester resin. This resin must be mixed with a catalyst in order to activate the chemical process that causes it to harden into its final form. The proper amount of catalyst to resin is critical. If you add too much, the resin will harden faster than it can be used. If you add too little, the resin may never harden at all.

Instructions

1

Put on a pair of rubber gloves and safety goggles before mixing fiberglass resin.

2

Pour fiberglass resin into a graduated, disposable bucket.

3

Pour catalyst into a smaller cup. You should have approximately 12 drops of catalyst for every fluid ounce of resin. For larger amounts, use 0.37 fluid ounces of catalyst for every quart of resin.

4

Begin stirring the resin with a paint stick and slowly drizzle the catalyst in.

5

Fully mix the resin and catalyst, scraping the sides and bottom of the bucket several times to ensure complete mixing.

6

Use the catalyzed resin as needed. When the resin starts to form gummy strings, stop using it and mix a fresh batch.