It is essential that a toilet fluid should kill harmful bacteria and germs to prevent them from multiplying. Elsan Blue's powerful anti-bacterial formula kills them on contact whilst eliminating unpleasant odours. Elsan Blue and Double Blue are the only fluids you can buy that exceed British Standards. That is why Elsan toilet fluids are chosen by caravanners, and boating and camping enthusiasts alike. Elsan Blue is pleasantly fragranced, non-staining and suitable for all chemical toilets and cassettes.