Polyester resin is the most commonly used type of resin and the cheapest. Resin is a thick fiberglass liquid that when mixed with 2 percent catalyst becomes a solid. You can use more or less catalyst to change the amount of time it takes to harden but don't use much less than 2 percent. Polyester resin will bond to almost any surface including metal, wood, foam, plastic and ceramic. When used on porous materials like wood, the resin will not penetrate the wood and form a strong bond unless it's thinned out. Polyester resin also is used for gel coat, which is fiberglass paint that has to be thinned for spray application. Polyester resin can be thinned out using no more than 10 percent acetone. Any more and the fiberglass will not completely harden.
Things You'll Need
- Rubber gloves
- Small bucket
- Polyester resin
- Measuring cup
- Stir stick
- Felt roller
Put on a respirator and a pair of rubber gloves. Fill a small bucket 3/4 of the way full with polyester resin using a measuring cup. Keep track of the amount of resin you poured into the bucket.
Add 10 percent acetone to the resin or 10 parts resin to 1 part acetone. Thoroughly stir the acetone into the resin until it completely mixes together.
Add 2 percent catalyst to the bucket of thinned resin and thoroughly stir it together with a stir stick. The fiberglass will harden within 30 minutes after the catalyst is added.
Apply the resin to the surface of the wood or other porous material using a felt roller. Roll the resin on as evenly as possible in a heavy coat and let the resin harden.
Tips & Warnings
- Wear rubber gloves when handling catalyzed resin to avoid chemical burns.
- Photo Credit Hemera Technologies/AbleStock.com/Getty Images
How to Mix Polyester Resin
Polyester resin is most commonly used in the manufacturing of boats, surfboards, kayaks and other nautical vessels. Because of its easy application...
How to Thin Gelcoat
Gel coat consists of fiberglass resin that is pigmented with color. Fiberglass resin is a thick liquid that requires a catalyst in...
How to Seal Wood With Polyester Resin
Polyester resin is used for laminating fiberglass reinforcement, molds and, yes, waterproofing wood. It comes in two types, finishing and laminating. Finishing...
How to Fiberglass With Epoxy Resin
Applying fiberglass with epoxy resin is a simple process. The epoxy resin comes in a two-part mixture with the adhesive contained in...
How to Use Bondo Resin Without Fiberglass
Bondo is a brand name for resin used to fix cars. The resin is mixed with another chemical called a hardener, and...
What Should Be Used to Thin Two-Part Epoxy Resin?
There are two primary ways to thin two-part epoxy. The first involves simply heating it, which improves its flow. The other is...