From what I understand, it is harmless. Here is a link to a guy who has had good results from using "Great stuff" foam: http://www.arachnoboards.com/ab/showthread.php?171191-The-Eight-Enclosure-creations-from-TalonawdHey i bought a Expanding foam today, and i´m thinking about use it on my aquarium to make a terrarium for a Boehmei!
Is Expanding foam toxic? or dangerous to T´s?' there is anyway to to that? Thanks!
Mike