Tilynn Ceramics use the very latest professional cleaning equipment that use high pressure rotating heads. No damage is caused to the floor finish. However natural stone floors that have been previously sealed may need another coat of sealer. We clean hard floors tile and stone both domestic and commercial. We are agents for Universeal stonecare products. The photos below show a kitchen floor that had not been re-sealed in 15 years. We professionally cleaned the floor and re-sealed. The finished floor looks just like new. The videos show a porcelain wood effect tile floor in a commercial area that takes allot of foot traffic. we professionally cleaned the floor and again it came up as good as new.