Foaming formula works fast to break down the toughest grout stains caused by mold, mildew, soap scum and hard water. Removes dirt build-up, set-in stains and soils faster and easier than all-purpose bathroom and tile cleaners. Recommended for porcelain and ceramic tiles, fiberglass and natural stone including granite. Multi-surface safe.- Foaming formula works fast to break down the toughest grout stains caused by mold, mildew, soap scum and hard water.- Removes dirt build-up, set-in stains and soils faster and easier than all-purpose bathroom and tile cleaners.- Hydrogen peroxide based formula without bleach.- Recommended for porcelain and ceramic tiles, fiberglass and natural stone including granite.- Multi-surface safe.- Sold as 1 Each..