Epoxy VS Polyester Resin

Well, polyester resin is hydrophyllic, and epoxy resin is not.
So when polyester resin wants to absorb water, epoxy resin will not.

I would go with epoxy resin in a heartbeat over polyester, although when I redid the floors of mine, I used polyester. I did not have the stringer rot like many here have.

I built a 200 gallon aquarium out of epoxy resin and plywood with a glass front panel last spring, and the epoxy was a snap to use compared to polyester resin. Plus epoxy once cured is inert, meaning it can't leach crap into the water. That's not an issue with a boat, but it was on a coral reef tank.

I got mine from UScomposites. They have great prices and great customer service.

I would never use poly based on my past experience. Another non Correct Craft project was almost ruined when the poly delaminated after numerous times getting wet. I had bought it at home depot and did not know what I was doing.

I spent about $1000 from Larry at www.raka.com and they too are great. You can discuss your project with them and they ship almost immediately. Larry even comes in on saturdays and sundays and I have called him with questions on weekends and he is more than happy to talk with me.

Scott

Ryan,
I agree with you to some extent. We used both on the 66 Mustang when doing the stringers and I made repairs to the hull using only the poly with cabosil. My thoughts, as silly as they may seem, was that the poly would adhere to poly the best. When that cured, epoxy was used. The important thing is to remember that epoxy will adhere to poly/ poly will not adhere to epoxy.
Chelle'

Still a long way from needing the epoxy or polyester. Just getting started pulling the floor to see the amount of damage. I'm still not a hundred percent sold though on which to use. Will the epoxy adhere to the hull very well? What are the disadvantages of using the poly. Is it that much more difficult to use.