Blue Diamond 4 litre Blue Toilet Fluid is an exceptionally effective, fast-acting and long-lasting toilet fluid. The toilet chemical is designed to effectively manage waste, whilst emitting a pleasant and fragrant smell in the waste holding tank to minimise odour. This toilet fluid is best suited to cassette-style toilets. The bottle comes complete with a childproof cap for safety purposes and an ergonomic handle, allowing you to pour the fluid more steadily.