ZERO ICE MELTING CRYSTALS - Zero Ice melting crystals will go twice as far as rock salt. Easy to handle-the smaller-sized granules are specifically designed for convenient fast de-icing application on sidewalks, steps and parking lots. It contains no harmful calcium chloride, doesn't pit concrete surfaces and is safe to lawns, trees or shrubs. Contains Potassium Chloride. Melts ice and snow almost immediately. Work at temp below zero degrees. Won't harm plants or concrete.