On Tue, 25 May 2004 19:03:41 GMT, "MMC" wrote:

Resin will eat the styrofoam panels you mention in your post. You can get
urethane foam in whatever thickness that will serve your purpose and is
compatible with epoxy, or polyester resin, and probably vinyl.
MAC

"Tom Best" wrote in message
. com...
. Can I use the blue or pink
closed cell foam from home depot or do I need special foam.


Where would one procure urethane foam cheaply and easily?

Ookie Wonderslug wrote in message . ..
On Tue, 25 May 2004 19:03:41 GMT, "MMC" wrote:

Resin will eat the styrofoam panels you mention in your post. You can get
urethane foam in whatever thickness that will serve your purpose and is
compatible with epoxy, or polyester resin, and probably vinyl.
MAC

"Tom Best" wrote in message
. com...
. Can I use the blue or pink
closed cell foam from home depot or do I need special foam.


Where would one procure urethane foam cheaply and easily?


1. Resin will NOT disolve the polystyrene foam if the resin is epoxy
resin. It is the styrene in the polyester that melts the polystyrene.
2. Under pressure from the crowd :-), we tested (again), blue
polystyrene insulation foam with epoxy and glass. Resin bond is
perfect but the foam has no shear strength and the sandwich has no
peel strength. Under stress, either the core falls apart or an outside
layer of the insulation foam will break. We took pictures and will
show them soon either at BoatBuilderCentral.com or at our tech.
support web site Bateau2.com
3.I have 30 years experience building and designing foam sandwich
boats and would never use anything else than quality marine foam:
Airex, CoreCell, Divinycell etc. Airex is expensive and outperformed
by others. It has a low heat deflection. Corecell was my preferred
foam until the compnay ATC went bankrupt a few months ago. SP bought
them but production has not resumed. Right now, we sell Divinycell
(same as Klegecell).
4. It's not cheap, you can't find it cheap and if you find a cheap
one, it's no good.

Jacques from bateau.com