Composition Materials Co., Inc. supplies plastic blasting systems, blast cabinets, blast rooms and dust collectors. In addition, Composition Materials manufactures Plasti-Grit® abrasive media in 5 grades of hardness (Urea, Melamine, Clear-Cut®, Acrylic & Polyester). Supplier of Walnut Shell & Corn Cob abrasives, Deflashing Media (Cryogenic Polycarbonate & Nylon Pellets), Aluminum Oxide, Steel Grit & Shot. Since 1923, abrasives, blast media, fillers and extenders.