Ingredients: Mixture of organic acids, Anionic surfactant, Thickener, Dye, Fragrance, Inert Ingredients & Aqua Heavy Duty Toilet Bowl Cleaner works by using its organic formula to dissolve tough stains, mineral deposits, rust, and grime, leaving the toilet bowl clean and fresh. It breaks down the stains, making them easier to remove during the cleaning process. Direction to use: Apply the liquid and leave for 15-20 mins. Scrub clean with a brush and flush. Application areas: Toilet Bowl, Wash basins, Sinks, etc No harmful acids / ingredients that damage toilets or plumbing systems, Biodegradable and safe for planet Heavy Duty Toilet Bowl Cleaner is formulated to tackle hard water stains by using its potent acidic formula to dissolve and eliminate the mineral deposits, leaving your toilet bowl clean and free from the unsightly marks caused by hard water. Regular use ensures a spotless and pristine toilet bowl. Package Contains: Heavy Duty Toilet Bowl Cleaner - 500 ml (Pack of 1)