Mean Klean 1-Gal. Concrete & Mortar Dissolver Dissolves and removes concrete, mortar, stucco or grout for a cleaner surface Non-acid formula contains no muriatic (HCl), sulphuric or phosphoric acid Non-fuming, non-toxic, 100% biodegradable formula Non-corrosive formula will not harm tools or equipment, paint, metal or wood Easily applied with standard pump sprayer equipment or a brush