COMPOSIMOLD-Reusable Molding Material: For Craft Molds. Use this material to create a variety of molds! Simply heat ComposiMold in the microwave, pour over the original part that has been coated with mold release, let it solidify, and remove. Many casts can be made. When finished with one, remelt and reuse over and over again! This package contains 20oz of ComposiMold. Conforms to ASTM D 4236. Made in USA.