I have used this several times for replicating small part molds...heat it in hot water till soft, (chewed gum)... form over part, let it cool, remove your part, add your choice of material....resin, 2 part epoxy...works really good with milliput. When cooled...Nearly Nothing ( won't say everything!) sticks to it but itself....No longer need the mold...heat it & reform something else.