A ready-to-use， acid-based cleaner delivers powerful foaming action for fast， efficient maintenance of shower stalls， tubs， sinks， floors， walls， toilet bowls， urinals and other similar surfaces. Foaming formula increases dwell time on vertical surfaces. Use Foaming Acid Restroom Cleaner only on acid-resistant surfaces such as ceramic tile， fiberglass， quarry tile， chrome and stainless steel. Strong acid removes soap scum and hard water deposits from surfaces in the restroom.