On Fri, 20 Aug 2010 06:00:33 -0700, Jim K wrote:
I think you only need it to be rain-free for 24 hours or so; I just did
some concrete work around our wood chute and it was solid when I took
the forms off in less time than that. Of course it'll take much longer
to fully cure, but I think it'll do so eventually - the critical bit's
just not having it completely saturated by water during that first
phase.

Agreed.

Oh, and someone (not sure if it was here or elsewhere) suggested using
plastic sheet over my wood forms rather than messing around with any kind
of chemical release agent. I tried that and it worked like a charm - I
had no trouble pulling the plastic-coated forms the following day
(sharing because I was impressed with how well it worked!).

cheers

Jules