: I'm not a chemist, but I don't thing humidity has any thing to do with epoxy
: cure.

I found a note about the stuff I'm using in the System 3 catalog, which I had not read earlier because it was, well, a catalog. But it did say the combination of resin and hardener provided to me is not sensitive to humidity.

I'll do most of the work on non-rainy, non-snowy days anyway. More natural heat on the sunny ones!