Blue Stuff Mold 4 Bars (Green Stuff World)Blue Stuff sticks is a new generation of thermoplastic molding material that can be reduced to mouldable conditions by immersion in hot water for 3 minutes. It will allow you to create an instant mold of any piece you wanted by pressing the plastic material against the piece you want to have the mold made from. After that, make copies by using any kind of putty, polyester resins or even epoxy resins. Nothing will get stuck. REUSABLE plastic moulding