a ? about fiberglassing over foam

[lobsterman]

Have any of you got any ideas or tricks to be able to fiberglass over foam, without it disentigrating the foam ???, i have heard of people coating the foam first with latex paint, or a water based polycrylic, (but i haven't had much success with either of them). Any ideas ???. ( also... i am using poly resin, not epoxy ). Thanks.

[ondarvr]

Use the correct foam for the job, or use epoxy.

Depends on what you're doing.

[lobsterman]

I just thought someone may have come up with a solution or way to use the rigid blue or pink foam for projects or items like dock boxes or live tanks etc., and then be able to cover them with fiberglass, have you got any barrier coat suggestions ???. ( maybe using a wax or wax paper would work, but it doesn't really bond to anything ).

[ondarvr]

I was cut short in answering the question.

You can buy polyester resin that is compatible with normal white EPS foam.

You can get this from Composites One.

http://www.ccponline.com/tds.asp?id=538

[lobsterman]

Thats cool, thanks, that may be just what i am looking for. do you have any idea of the cost per gallon ?, i think i am paying about $26 a gal. now for the regular poly resin.

[ondarvr]

It will cost more and the minimum amount is 5 gallons. This is a specialty product and costs more due to higher raw material prices and the low volume being made.

[Ike]

I did what you want to do. I bought the pink foam from Home Depot and encase it in fiberglass. However, I used epoxy resin. No need for special foams or special resins.