Santeen toilet bowl cleaner is a unique formulation of hydrochloric acid that will remove rust lime and scale buildup on toilets humidifiers water coils refrigeration units air conditioners boilers lines and valves. Can be used to clean iron copper brass or dissolving concrete. Santeen Toilet Bowl Cleaner is so concentrated it can be used 1 part to 15 parts of water depending on the strength needed. Brand Name: Santeen Scent: No Product Type: Toilet Bowl Cleaner and Delimer Container Size: 32 oz Product Form: Liquid Contains Bleach: No Packaging Type: Bottle Concentrated: Yes Number in Package: 1 pk