Oh sorry, maybe its just an australian thing... I've read about it on a few different forums, its like a paint that dries really slick. People use it when breeding insects like roaches, ants etc to stop them escaping. They can't climb over it once it dries. Its supposedly water-based but doesn't wash off when it dries. I'm not sure if it evaporates - I haven't used it myself since I've just stuck with vaseline in my breeding containers but am hoping to find a way to have them in with my frogs without giving them free run of the enclosure. Its like teflon which is the non-stick part of non-stick saucepans... This is toxic when heated to about 300 degrees because of the fumes produced but other than that I can't seem to find any more info on its toxicity. If anyone has used fluon and has any more info on its toxicity or lack of toxicity to frogs, would love to hear from you.