Epoxy Resin adhering ot old gel coat

[83mulligan]

My boat has what appears to be gelcoat brushed into the bilge and sole area of the boat. Does this have to be ground off to get a good bond between the new fiberglass with epoxy or will it adhere ok? How do I know if it is gelcoat or paint?

 

[ondarvr]

Re: Epoxy Resin adhering ot old gel coat

Polyester resin and gel coat are basically the same thing and epoxy will bond to both very well.

Paint is normally a thin layer when compared to gel coat and if you sand on it it acts much different.

 

[83mulligan]

Re: Epoxy Resin adhering ot old gel coat

this stuff is really tough to grind off. I'll try and get a picture up later.

 

[Bondo]

Re: Epoxy Resin adhering ot old gel coat

Does this have to be ground off to get a good bond between the new fiberglass with epoxy or will it adhere ok?

Ayuh,... If there's Any question about it,... Grind it out....

A lay-up is only as Strong as it's weakest link.....