Epoxy and mat
The binder for some types of mat may not be soluble in epoxy so it’s hard to wet mat out if you use epoxy. If you want to use mat make sure you buy suitable mat and that may be the only problem with using mat and epoxy. In the past you couldn’t buy mat that had such a binder so it got a bad reputation with epoxy but I have been told that this is no longer true. The only time I tried mat with epoxy I found this wet out problem to be true but that was years ago and I have only used polyester with mat since then. So I don’t know first hand if suitable mat is available.
Mat is used to add bulk or act as a tie between layers of something else. Mat is easy to sand and makes a great finish layer. Roving and cloth are stronger but don’t bond well to themselves or each other so mat is also great between layers. I use polyester resin for repair work on boats and it's fine. Epoxy has higher peal strength but you don’t need that with a repair so way add the extra expense and complication by using epoxy?
Good luck with the repair,
Last edited by Tartan34C; 12-22-2006 at 06:35 AM.