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dadiOH[_3_]

wrote:

Ok cool. Then that is what I'll do. It sucked though because the
finish looked perfect. Then when it was dry it felt like glass.
Rubbing my hand on it, I hit a terribly sticky spot. Uncured epoxy :/

Are you 100% sure that it was epoxy? I ask because casting resin is usually
polyester. People tend to call any two part resin "epoxy" but that is
something totally different from polyester.

Polyester resin needs two things to harden: the first is the catalyst; if
you mixed the catalyst & resin even cursorily I would not think your lack of
cure was due to lack of catalyst. The second thing it needs is lack of
air...polyester doesn't cure completely if it is exposed to air. The reason
for that is so that multiple layups can be made. For exposed surfaces, one
uses a "finishing resin" which has a bit of wax dissolved in it...the wax
keeps away the air and the resin cures hard. I've had occasions when
finishing resin stays tacky in spots, no idea why, one would think that the
wax layer would be even. Cure is another coat or dust with something to
block of air.

OTOH, maybe it *was* epoxy. How long did it take to cure hard? Hours =
epoxy, minutes = polyester.

--

dadiOH
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