Ultra performance. Formulated to handle sealing and grouting showers, baths, tubs and tiles. Seals out hot and cold water. Accommodates expansions and contractions caused by weight of water and people. Silky smooth formula. Dries tack free in minutes. Finger smoothable. Water clean up. Abrasion resistant surface stays bright, easy to clean. Non-yellowing and protected against mildew and rust. Remains flexible, will not crack. Vacuumized.