In 1974, Chem-Pruf Fiberglass Door Company manufactured the world’s first industrial Fiberglass Door System and Chem-Pruf is still the undisputed leader in the industry. Chem-Pruf corrosion resistant doors can weather many types of corrosive environments from chemical plants to pulp and paper mills to water and wastewater treatment, to coastal environments. Need a fire rated door, storm door or just a standard fiberglass door, maybe a custom gelcoat door color, pattern or design? Whatever the challenge, Chem-Pruf has the solution.