Quote:
Originally Posted by bstewart0529
Why doesn't the epoxy stick well to the poly?
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Epoxy will stick just fine to the poly... it sticks well to all types of glass, and is the strongest. The opposite is NOT true- meaning that poly will not stick to epoxy. It needs a conversion coat (like vinylester) first. This comes into play when doing a hull repair with epoxy, and then following with a gel repair (since gel is a tinted poly).
It would be helpful to know when MC made the change from poly to vinyl and when they went from vinyl to vinyl-epoxy. I know CC transitioned in '89 and '93. I would only consider a poly repair on a poly hull (though even then I would opt for epoxy for its strength and workability advantages). On a vinyl or vinyl-epoxy hull, I would not consider poly as an option.