Effectively cleans deposits from tub and tile surfaces without hazardous ingredients. Breakthrough formula replaces traditional mineral and organic acids. PHOSPHATE & VOC FREE CLEANER FOR USE ON: Tile, Tubs, Grout, and Porcelain. Until now cleaning stubborn deposits from tubs and tile has required using hazardous acids and harsh chemicals. This new earth-responsible formula melts away calcium, lime, and hard water deposits and is safe for most metals. Our non-fuming cleaner is effective on soap scum, hard water spots, and grout lines.