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Polyurethane paint
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Evan Gatehouse2
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First recorded activity by BoatBanter: Aug 2006
Posts: 54
Polyurethane paint
Douglas wrote:
I have another question about polyurethane paint. After priming the
epoxy and using a poly paint would it be lighter in weight than gel
coat finish and more fade resistant. The weight issue is important
because I'm using it on a canoe.
wrote:
Flase.
Both one and two part polyurethanes are great finishes over epoxy
substrates *provided* there is no remaining 'amine blush.'
Manufacturers of PU (like Interlux) have all developed a 'tie coat' or
'primer' to isolate the epoxy sustrate from the overcoating paint.
Here's what Interlux says:
"Be sure to use Epoxy Barrier-Kote 404/414 over clear epoxy to prevent
blush from affecting drying and adhesion of Brightside".
MW
Gelcoat is heavier guaranteed. It's a thick coloured resin layer vs.
thin polyurethane paint.
Evan Gatehouse
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