Hey, I was wondering if I can use Zavlar liquid rubber to make a water dish. I would let it dry for a month to ensure a full cure. The Liquid rubber is used by many fish keepers in making fish tanks they seal the inside with the liquid rubber to help keep the plywood dry. If I used plexy formed it to a pond shape drilled a hole for drainage and pipes then painted it with liquid rubber do you think this would be ok for a tortoise?