Compotite Shower Pan was founded in Los Angeles in 1938 to manufacture and market "Compotite", a patented material developed by G.A. Morthland as a waterproofing substitute for lead shower pans in homes. In 1958, the company was incorporated and soon Compotite was included in all model plumbing codes and sold nationwide to waterproof shower floors under a thick-bed mortar setting of ceramic tile or marble.In 1992, COMPOSEAL GOLD 40 mil bondable waterproof and crack suppression membrane for use with thin-set tile or marble installations was added to Compotite's product line. COMPOSEAL GOLD meets the American National Standard: ANSI A118.10 Standard for Load Bearing, Bonded, Waterproof Membranes for Thin-set Ceramic Tile and Dimension Stone Installations, and is sold in 90 foot rolls, 5 feet wide through tile distributors across the country. Bonsal American has marketed COMPOSEAL products to the tile industry in the Eastern US since 1994.