Thanks Bogertophis. I'll research some sealers.

I should have clarified a little. Yes, the snakes will be separate. There are actually 3 different levels, so it'll look like 3 stacked enclosures. Moving the shelf up makes the bottom 2 levels each 23" tall, and the top one, which was storage is 19" tall.

This might be super dumb, but what if I just lined the compartments with PVC or thin Melamine. The sides are completely open, so I have to cover them with something anyway. If I just use melamine and silicone the seams would that work?

I did find these animal heating pads today.

https://www.chewy.com/kh-pet-product...EaAhEHEALw_wcB

They are designed for chickens and to be in contact with the animal. I am wondering if I put them inside the enclosure, but under the substrate, and on a thermostat, would they work? As you said, they need some heat, but I don't need anything crazy.