Poly grout is a ready-to-use mixture (no mixing required). As a specially formulated water repellent and anti-spot formula (no need for a protective coating), this product is recommended for new ceramic tiling and for repairing existing tiling. Recommended uses: filling tile joints around the bathtub, shower, and kitchen. This grout can also be used to refill joints between newly installed ceramic and for repairing old grout. Not recommended for the following: applying to floor tiles or tiles on a horizontal surface, joints between the bathtub or the shower and tiling, joints larger than 3 mm (1/8 in.) wide, continuous immersion in water. *Cleaning: immediately wash hands in water after use. Clean tools with warm and soapy water within an hour after being used.