I tried to make the title completely self explanatory. I'm planning on building a new rack system, enclosed and styled after a barrister bookcase. I just want to know what I can use to seal the wood. Whether that be paint or water sealer or what. I just want to protect the wood from moisture and make it last longer.
I currently am using plastic tubs, I use aspen bedding with a paper towel base and a side heat lamp, it's only two tubs. However they are building up enough humidity to form water on the sides and top. Is there a way to stop this or do I just have to wipe it down every day?
Note: For anyone who wants to caution me about how difficult it will be to build the rack I mentioned I'm a carpenter so it won't be a huge problem.