Safe Step 7300 melts ice and snow on contact. Features a powerful, self-initiating chemical reaction which generates heat so melting occurs even in exceptionally cold weather. Melts ice down to -25 degrees Fahrenheit/-32 degrees Celsius. Won't leave a powdery residue. Safer when used as directed on air-entrained, cold-weather concrete that is at least 1 year old. Pellet shape penetrates deeper into ice and has an effective time release feature for more efficient, even melting.