Re: Polyester vs Epoxy??

A lot depends on where you're going to use the boat. Dynamite Payson
seems to get by with polyester on his boats, but here in humid, hot
Florida, it's usually a bad idea. Have you checked around for
alternate sources? Your epoxy seems to be four times as expensive as
polyester; there are sources where good quality epoxy can be had for
$31-$33 a gallon, or about twice the price of polyester.

Gary Blankenship
Tallahassee, FL

> Polyester is just so cheap compared to Epoxy, so I am tempted... ..

I calculate

> sheathing my hull and decks will cost me under $200US in Polyester

resin (plus

> cloth) but Epoxy will cost around $800USW (plus cloth)...

I know there has been a lot of discussion on this subject already.. but....
Polyester is just so cheap compared to Epoxy, so I am tempted... One of the
possible solutions could be the suggestion I received from a company in England
which is a distributor for GRP materials.. I quote...
"G4 Sealer Varnish
A moisture curing single part polyurethane varnish. Withstands temperatures up
to 200c with good chemical resistance. Cures to translucent amber colour...

G4 is probably the best primer for ensuring a good bond between Polyester resin
and materials such as metal, wood and concrete. It is recommended by several
leading manufacturers of Polyester resins for that purpose. On a clean bare
substrate brush on the G4, as soon as it becomes finger-tacky but within 4 hours
apply the Polyester resin and Glassfibre laminate."

Has anybody out there tried this method?? Just to compare, I calculate
sheathing my hull and decks will cost me under $200US in Polyester resin (plus
cloth) but Epoxy will cost around $800USW (plus cloth)...