Re: Waterproofing, non-toxic sealer??
If you are only dealing with high humidity not standing water you can use any top quality exterior primer and then same quality exterior paint. But it will not work if you do not follow the directions for both to the T and I say that because of an epic fail I experienced. Stay away from the paints, primers and silicone/caulk with mildew inhibitor, it releases a chemical over time to ****** the mold that may not be good for super sensitive amphibians ie. frogs.
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What I share are only my experiences, point of view or things I have read. They are not what you must do or believe. They are simply things to give you ideas and research further so you can make an educated/informed decision on what may work best for you and your animal.
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