Re: Polyurethane and tacky epoxy

provided, of course, that no surface blush has developed...

We have put wet latex over wet epoxy (epoxy that was mixed minutes
before).  If it is a top epoxy you get a perfect finish, of course you
cannot  brush the latex paint on....

folks usually wait a bit past tacky  (but still soft enough to put your
thumbnail into the epoxy).

Actually epoxies take about a week to fully cure, so if you have
topcoated epoxy in less than a week, you've actually painted over not
fully cured epoxy anyway. At least in theory, the coating fuse and you
get a chemical as well as a mechanical bond.

paul oman
progressive epoxy polymers inc
www.epoxyproducts.com/marine.html

On Jun 23, 6:26 pm, Lodewijk Stegman <ajeevee-ditwegha...@xs4all.nl>
wrote:

I laid some marine enamel down once on tacky epoxy, forget the brand,
but it made a great bond. But note it was pure luck because in other
attempts to do this in uncontrolled environment led to major peeling.
I think the best way to go is "traditional", washing the surface,
roughing it up, and depending on a mechanical bond. Just my opinion.

doublesb@hotmail.com schreef in news:1182605034.890782.50700
@m36g2000hse.googlegroups.com

I have never tried it, for the reason that my local vendor warns against
doing this. They even claim that is wise not to paint epoxy before it is
fully (and I mean FULLY) cured. That can take up to a week, depending on
temperature and formulation of the epoxy.

Adding another coat, before the previous coat is not fully cured, works
great for the adhesion between coats of epoxy, but not between epoxy and
something else.

Has anyone tried or know what would happen if you applied a
polyurethane product over epoxy when the epoxy was still tacky. Would
the adhesion be better? Would it intefere with the cure of the epoxy?
What about a latex primer over sticky epoxy? Anyone try anything like
that to try and get a better adhesion to the epoxy?

TIA,

Bob