SailNet Community - View Single Post - Epoxy vs. fiberglass
View Single Post
Old 04-17-2010
Maine Sail's Avatar
Maine Sail Maine Sail is offline
Senior Member
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,692
Thanks: 17
Thanked 169 Times in 133 Posts
Rep Power: 16
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Originally Posted by CalebD View Post
Another reason most boat builders use a vinyl based resin (besides being cheaper) when building boats in a mold is that the Gel-coat which is sprayed into the female mold first is also a polyester based resin and bonds well with the vinyl based resin used to make the structural hull.

Just a clarification. Most builders, perhaps in excess or 95% or more of them, have historically used polyester resin for laying up hulls not vinylester. Only a select few builders lay up with vinylester. Polyester is the resin of choice for most builders, still is.

Builders like Catalina for example use only a sprayed in layer of vinylester on top of the ISO/NPG gelcoat then the boat is layed up in polyester resin. The vinylester behind the gelcoat slows or prevents osmosis from getting into the polyester resinated substrate..

For the repair the OP is doing polyester resin is more than adequate...
-Maine Sail / CS-36T

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

© Images In Posts Property of Compass Marine Inc.

Last edited by Maine Sail; 04-17-2010 at 04:28 PM.
Reply With Quote Share with Facebook