United States Antimony Corporation produces and sells antimony, silver, gold, and zeolite products in the United States and Canada. The company's Antimony division offers antimony oxide that is primarily used in conjunction with a halogen to form a synergistic flame retardant system for plastics, rubber, fiberglass, textile goods, paints, coatings, and paper. Its antimony oxide is also used as a color fastener in paints; as a catalyst for the production of polyester resins for fibers and films; as a catalyst for the production of polyethelene pthalate in plastic bottles; as a phosphorescent agent in fluorescent light bulbs; and as an opacifier for porcelains.