Build Secrets
Use only fresh fiberglass resin, as it does not store well. If you have a can that has been on your shelf for more than a year, drop it in the trash can. When resin gets old, it picks up moisture and sometimes will not harden, even when used with plenty of catalyst. If it doesn’t harden, you have a real mess on your hands--you’ll have to scrape away all that gooey stuff before starting over. Pouring more catalyst on resin that is not hardening will not help. The addition of more than the recommended catalyst to slow resin will make the resulting fiberglass joint brittle and prone to cracking. We recommend buying resin in smaller cans and keeping your supply fresh during a long-term project. The small cans will pick up less moisture, and you will lose less if you have to throw out a partial can. Also, buy lots of rubber gloves. They tend to have a short life, and you don’t want to be in the middle of a project when your only pair comes up holey. Never work with fiberglass without eye protection. When brushing resin onto cloth, it is easy to splash a dab into your eyes, with potentially harmful results.
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