Elsan Blue's powerful anti-bacterial formula kills germs and eliminates odours. It is the only fluid you can buy that exceeds British Standards.  Elsan Blue is pleasantly fragranced, non-staining and suitable for all chemical toilets and cassettes.Elsan Blue Features: Toilet fluid, Effective toilet additive. Eliminates unpleasant smells. Reduces gas build up. Keeps your tank clean. Stimulates the break down of waste matter and toilet paper. This Elsan camping toilet fluid is recommended for all users of portable, cassette and pump-out toilet systems in boats, caravans and motorhomes.