Are there any alternative uses for PIR rigid foam? I got way more than this photo shows and don't really want to land fill it. Other than jamming it in little gaps as a secondary insulation I'm at a lost what to do with it.   Is it fire-proof? Is it heat proof? Can I carve it and cover in clay ? Can I use it for moulds? Does hot glue stick to it or melt it? Does it give off fumes when hot/burning? Is it petrol resistance? Can I use it for po