Cement Dissolver uses a unique, biodegradable, non-acid chemistry which completely removes concrete by dissolving the calcium from the cement which allows the rinseable mud to be safely and totally removed from virtually any hard surface. Just spray on, wait 15 minutes and then rinse off.” This biodegradable solution comes in a 3:1 concentrate for economical application. Most effective on concrete, mortar, grout and stucco less than 6 months old. Perfect prep product to open the pores of concrete floors for polishing or application of stain or epoxy. To use, mix one gallon of product with 3 gallons of warm water. Works best when mixed with warm water or left in the sun to process. **NOT effective on self leveling cements that contain polymer plasticizers or polymer-modified binder system and fillers Easy to use: Bio-degradable, Non- Acid formula - just mix with warm water! Immediate Results: Quick & Proven! Results in 30 minutes! Completely dissolves the cement to produce rinsable mud! Removes: Concrete Morter Grout and Stucco LESS than SIX months old! Perfect to Prep Concrete for Etching, Staining or Epoxy application! NOT effective with self leveling polymer-modified cement or polymer-modified binder system and fillers