Green Seal GS-37 Certified. A superconcentrated cleaner that is an excellent multi-use product for tile & grout, carpet spotting, and general-purpose cleaning. It is formulated to be safe to use on most washable surfaces: walls, floors, bathroom & kitchen surfaces, carpets, etc. It quickly cleans and restores tile and grout by removing mineral deposits, soap scum, stains and discoloration. Natural citrus fragrance. It contains all biodegradable raw materials and is NSF C1 registered. Four 3-liter bottles per case.