Specialized professional grade formula Cleans and protects stone in on step Restores protective seal For use on: Granite, marble, travertine, limestone, terrazzo, slate, other natural stones, porcelain, ceramic tiles, sealed concrete, quartz Not for use on: Unsealed wood Pros know that stone surfaces require extra care that all-purpose cleaners can t deliver. This professional grade, non-caustic cleaner highlights the natural beauty of surfaces and protects against future permanent stains