Santeen manufactures seriously powerful acid-based cleaners and drain openers. For more than sixty years plumbers, maintenance professionals, and do-it yourself homeowners have used Santeen Toilet Bowl Cleaner, S-T Drain Opener and Chrome & Tile Cleaner because they know Santeen products work, and work fast. Santeen Products is serious about safety too. Because the products use acids and alkalines as the bases for their cleaning power we strongly suggest that users read and follow the directions carefully. Gloves and safety glasses are recommended, as well as proper ventilation in almost every application. New tamper-resistant packaging prevents the child-proof caps from loosening and fumes from escaping from the sealed bottles. Santeen Products - Get Serious.