Saiger's Tsunami Tile and Grout Cleaner is a high pH "GIGANTIC WAVE of Clean" prespray! At the top of the pH scale, it's perfect for tile, grout, stone, and concrete. It's also a great booster for super-soiled commercial, poly, and olefin carpets. This is not safe for wool or 5th-generation nylon. Take care to wipe residue off items you might come in contact with. BEWARE: this product can remove some wax finish off VCT surfaces.