Stonhard offers an additive for its flooring systems that acts as a permanent bacteriostat and fungistat against a broad range of bacteria and fungi. This antimicrobial, organic thione compound is toxicologically safe, EPA registered, and contains no heavy metals. Washing the floor does not affect its properties. Ideal application of this product are in environments where hygiene is critically important, such as: hospitals, pharmaceutical facilities, research laboratories, clean rooms, food processing facilities, breweries, dairies, commercial kitchens, lavatories, and showers.