Interplastic Corporation is a specialty chemical company with its headquarters in St. Paul, Minnesota. The company focuses on the production and sale of unsaturated polyester and vinyl ester resins, gel coats, putties and colorants for the composites and cast polymer industries. Interplastic is ISO 9001:2008 and ISO 14001:2004 certified. Interplastic Corporation is a subsidiary of IP Corporation, a specialty chemical company with its headquarters in St. Paul, Minnesota. The North American Composites division distributes composite materials, as well as resins, gel coats, initiators, core materials, fiberglass reinforcements, equipment, and other related composite products from other producers. The company sells its products directly, as well as through a network of distributors in North America and internationally. It has product development laboratories in Minneapolis and St. Paul, Minnesota; Fort Wright, Kentucky; Hawthorne, California; and South Bend, Indiana.