On Sat, 05 Jun 2004 19:08:20 -0400, Glenn Ashmore
wrote:

Thanks Glenn, then what is this E-type mat? This is where I'm getting
confused.
Ebay
This fiberglass is E-type, and is compatible with both polyester and epoxy resins. E-type fiberglass is the most common type of fiberglass. If someone doesn't specify the "type" of fiberglass, then it is most likely E-type.


First off roving and mat are an extremely inefficient use of epoxy. For
maximum strenght the resin to glass ratio with epoxy should be 50/50 or
less resin. Because of the open weave roving sucks up way to much
resin. The other problem is that most mat is held together with a
styrene based binder. Polyester desolves the binder but epoxy does not
so the bond is to the binder not the glass.

Dan wrote:
Can you use chopped strand mat with epoxy?
I read one article that says no and then I read another article that
says it is ok.
I read where mat must always be used between two pieces of woven
roving when using epoxy, and then I read another article that says it
is ok to bond two pieces of woven together if you use a thickened
epoxy between them.
I am confused.
I'm not building a boat. I am repairing one, so I will not be using
polyester, just epoxy.
Thanks,
Dan