I'm new to this forum but I've had my ball python for about 10 years now I would say. I've been using a ceramic heat emitter on a thermostat but after reading around I now realize the heat mat is the way to go. Well today it came on the mail and looking at the instructions it says to use polyethylene insulation with it. Does anyone use this? I'm using a 40 breeder as the enclosure. Thanks for any info.