KWIK SAND is formulated specifically for the concrete industry to remove hardened concrete from trucks, equipment, forms, hoppers, pumps, tools, etc. KWIK SAND works without harsh acids like Sulfuric, Hydrofluoric, Muriatic and Phosphoric. It is so safe that it is classified a Non Hazardous by the DOT. It has been formulated to remove large amounts of concrete build-up quickly. KWIK SAND will remove 1/8 to 1/4 of an inch of concrete at a time.