Sealing a Boamaster enclosure?

[LadyWraith]

I remember seeing a recent thread regarding Boamaster enclosures and someone (Mikoh perhaps?) mentioned they can leak due to not being sealed. Well, found out the hard way that is correct. My question: what would be the best material to seal them with? I was thinking caulking for bath tubs/showers... but wasn't sure about the fumes being harmful. Also, is there more than just the seams where the pieces fit together that need sealing? TBH, I haven't even taken a look to see where else might be an issue but might as well inquire since I can't really do anything about it til the work day ends.