CRL AKEMI® Stone Cleaner is a slightly alkaline cleaning agent. It is free from phosphates and lyes. Biologically degradable. Used for thoroughly removing building dirt. Removes coats of polish and wax, slight concrete films, oil and grease, soot and tar, the remains of synthetic paints as well as plaster on all natural and artificial stone such as marble, travertine, terrazzo, granite, brick slabs, tiles, fair-faced concrete and fine stoneware.