Jeyes Sanilav Toilet Cleaner and Descaler is a powerful cleaning chemical that is only for professional use. Formulated from phosphoric acid, this cleaner cleans and removes limescale easily whilst freshening and neutralising bad odours. It is very effective in the killing of harmful bacteria that often lies in washroom environments. The chemical can be used on cermic, stainless steel and chrome plasted toiet bowls and urinals. It is also safe to use with septic tanks, however please do not use on marble or enamel surfaces.