Nilco W1 Citrus Toilet & Urinal Cleaner is a slightly viscous, mildly acidic, solvent-free toilet cleaner designed primarily to maintain W.C.s and open urinals in a clean hygienic condition. Nilco W1 Citrus Toilet & Urinal Cleaner is also designed to remove hard water deposits and to leave a strong clean citrus fragrance. This product contains a powerful biocide.