Ardex Flex Sanded Grout is a Portland cement-based grout modified with powdered polymers that provide a smooth finish for floor and wall tile joints up to 1/2-inch wide. It is stain-resistant, water repellant, naturally resistant to mold and mildew formation, fast setting, and has good flexibility and high bonding power. For grouting porcelain, glass, quarry, moisture-insensitive stone, ceramic & mosaic tile in interior and exterior floors, wall, and countertop applications. Available in 26 colors. Circle 306 on the Reader Inquiry Card.