- Mon May 25, 2009 8:40 pm
Oh gosh--what can I say? Polyester has been used to build thousands of boats--maybe millions. Polyester worked and it still works. However it is older technology and there are much better resins to use today. If you've just got to have the resin that sets off almost instantly you would be better served by using something like vinylester. Yes--both smell, both are toxic, neither is completely waterproof (but it really doesn't make any difference for kayaks). Epoxy is much better, much stronger, less toxic, easier to work with, has little smell, and is a much better water barrier. Epoxy has about 4 times the adhesive strength of polyester.
If I had to rate the resins from 1 to 10 I'd give polyester a 3 or 4, vinylester a 7, and epoxy a 9 (because there are better resins than epoxy).