The original tile and grout cleaner. VIPER VENOM is the solution of choice for those who prefer a high alkaline, solvent fortified, chemical for heavy soil. It will remove years of built-up grease, soil and stains. VIPER VENOM dilutes with one part water for use on tile and grout. It can also be use on a variety of other hard surfaces when properly diluted with water.RTU pH = 12Dilution Range = 1:1 - 1:32