ComposiMold (Original) 40oz. Reusable Molding Material, re-heat to re-use! Use this material to create a variety of molds Many casts can be made When finished with one remelt and reuse over and over again Conforms to ASTM D 4236 Made in USA Non Toxic, Microwaveable, and Re-usable for dozens of unique molds. ComposiMold is a 100% reusable mold making material that works by melting and pouring. Many casts can be made using the same mold, and when you are finished with that mold, you can re-melt it and re-use it.