LS/CS is a penetrating silicate treatment that hardens, densifies and dustproofs concrete flatwork. Unlike conventional hardeners, it does not have to be scrubbed or flushed. Simply spray LS/CS on the surface and spread it out with a microfiber pad. LS/CS will not trigger or contribute to surface ASR (alkali silicate reaction) and will dustproof freshly troweled “green” concrete, or existing floors of any age.