I was mainly thinking to seal the wood to reduce the chance of mold. I read articles that said mold grows at around 70-90% humidity but others said it could grow at 40%. I think the 70-90% is probably more accurate because other wise there would be mold even in some of my drier cages. If that is the case then it should be safe not to seal it like you said, at least for a fair amount of time.
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