I was talking with an architect friend of mine about the challenges of maintaining a high-humidity enclosure. We were trying, as Chris suggested below, to find a middle ground between FRP and contact paper as a cover for plywood. He first thought of plastic laminate (e.g. kitchen counter material), but then suggested using EPDM.
EPDM is a synthetic rubber mostly used as a pond liner. It's non-reactive and non-toxic, highly UV and heat resistant, thin, flexible, and cheap. It's specifically designed as a moisture barrier and would be very easy to install in a plywood box. It wouldn't have to be laminated onto the wood prior to the enclosure being assembled, so it's replacable. Finally, since it's so flexible I could make all the corners a little round so the cage'll be easier to clean.
Does anyone here have any experience with it?
Thanks in advance,
Randall

