Our cement stain cleaners contain citric acid, propanediol butyl ether and lauryl ether 7. It can easily remove hardened cement and plaster. Quickly penetrate stains and simplify the cleaning process. Its use is simple: spray the cleaner on the concrete stain, wait a few minutes for it to dissolve, and then wipe it clean with a cloth. The strong formula softenes and dissolves concrete quickly, easily removing concrete residue from equipment, floors and tools during construction.