Polyester resin over floatation foam

[Ledou42]

Has anyone done this? Will it melt the floatation foam and if so how to treat it before using polyester resin? I have replaced my stringers and want to fiberglass over the the whole floor before putting the floor back down. Any help would be great

 

[Scott Danforth]

It will not melt the foam. Resin by itself will simply crack. Resin needs cloth

 

[Ledou42]

Yeah I am fiberglassing it but wanted to be sure it wouldn’t melt the floatation foam that is there.

 

[Chris1956]

I have always heard that polyester resin will generally melt foam, except for certain kinds of foam. I think you should try a sample.

Epoxy resin will not melt foam.

 

[Scott Danforth]

2-part flotation foam is polyester foam.

 

[tpenfield]

styrene foams (aka styrofoam) is what poly resins like to melt. Urethane foams are fine for poly resins.