I experimented with some plaster, with the goal in mind to making a non-particulate substrate for desert snakes and lizards that can be wiped clean. Somebody asked this question awhile back here, and I'm here to tell you that dried plaster works very well with a UTH. It conducted the heat wonderfully in the chunk I experiemnted with.
Anyone have any ideas what to seal it with? I tried some non-toxic acrylic paint from a hobby store. Looks great, but I really need some kind of clear coat over that. Tried a dab of waterbased poly on one end. Seems OK. Just looking for more ideas. Thanks.
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Mark


