Bring the bright white back to your tired-looking tile grout with the 151 Tile & Grout Revival Pen. This easy-to-use pen quickly conceals discolored grout lines, leaving a fresh, white finish that's long-lasting and mold-resistant. The water-based, low-odor formula is safe for indoor use and dries quickly for minimal disruption. Restore the beauty of your bathroom or kitchen with the quick and convenient 151 Tile & Grout Revival Pen - White.