Liquid Poultice is an environmentally safe, biodegradable cleaner designed for deep cleaning all porous materials and grout including acid sensitive surfaces. The cleaning action of Liquid Poultice penetrates deep into the pores of the surface to safely lift out various types of dirt and grime. Liquid Poultice is especially effective for cleaning organic materials like coffee and tea. Deep cleaning action for most surfaces including: Granite, Concrete, Clay Pavers, Marble, Terrazzo, Ceramic Tile, Sandstone/Flagstone, Brick, Masonry Surfaces, Limestone. Coverage: 500 - 1,000 square feet per gallon.