This is a handmade Thick but flexible Poly-Plastic mold that is made to use with resin, but, can also be used with Clay, soap, Chocolates ect... This is a 21/2" wide New Style Dripping Heart Back Off Custom made and designed By Molded From Love If pieces come out not shiny, simply coat with resin or resin spray. That is what I do with all of my pieces anyway. Do not put in the oven or near heat or flame. Molded From Love 2017 Pieces made using this mold can not be used to remake into molds for resale.