Custom Building Products Simplegrout Quart Natural Gray Pre-Mixed Sanded Tile GroutReady to use, no mixing, no mess alternative to traditional sanded grout. This sanded, non shrink and crack resistant formula is highly resistant to most common household stains retaining original color for years to come. Ideal for new tile grout installation and restoration of existing tile grout. Grouts ceramic, mosaic, quarry, porcelain, stone tile, marble, and granite. Porous stone can be stained by grout; follow directions in surface preparation