This is a Durable plastic that is made for Resin Casting. Pieces pop out easily-May have a few water marks, but a thin coat of resin or resin spray will take care of that. An Original Idea by Molded From Love Vintage Mid Century fish tail shape Signs Pallet Perfect for Brooches, earrings Sweater chains ect. Do not put in oven. Molded From Love 2022 All Rights Reserved.