Union Corporation engages in cement business in South Korea. The company offers building materials, such as white Portland cement, tile construction products, plastering and masonry products, flooring products, water proofing and repellents, and additives; refractory materials, including calcium aluminate cement and aggregates; and civil construction materials comprising repair and reinforcing products, and tunnel and underground products. It also provides filtering devices, including filter and screw press, unifilter, fiber filter, and nonpoint pollution reduction equipment; and ozone systems. The company was formerly known as Union White Cement Co., Ltd. and changed its name to Union Corporation in July 1977. Union Corporation was founded in 1952 and is headquartered in Seoul, South Korea.