Why start a business in the chemicals industry? Interplastic has its resins, er, reasons, including its resins, esters, gel coats, and additives as well. The company's Thermoset Resins Division manufactures high-performance materials for the composites and cast polymer industries. The Molding Products Division makes molding compounds for automotive, industrial, and marine applications. Its North American Composites unit provides international distribution services. Interplastic markets its products to makers of everything from marine coatings to shower stalls.