I have just about finished my cuban rock iguana enclosure. All I have left to do is waterproof the inside and seal the seams inside. Does anyone know a good waterproofing substance to use that isnt going to be harmful to the iguana? Im also trying to find a new bedding for the inside of the enclosure, I want to use something other then cypress mulch that more closely relates to the iguana's natural habitat possibly a sand/soil mix. any suggestions/tips would be greatly appreciated.