Zep Acidic Toilet Bowl Cleaner removes rust, dissolves organic stains, and eliminates hard water residue from toilets and urinals. The thick gel formula clings to vertical surfaces and gets rid of the most stubborn stains. The squirt top nozzle makes for an easy under the rim application. This professional grade acidic formula clings longer to remove stains with less scrubbing. Zep Acidic Toilet Bowl Cleaner leaves a fresh winter green fragrance.