Qik Joe 50 lb. Polar Express Ice Melt. It is a time release blend of calcium chloride in flake, potassium chloride in granular, and sodium chloride in crystal. This safety max formula allows the product to melt at lower temperatures and is safer for the environment. It contains heat generating ice control crystals that ensure performance at lower temperatures, working effectively down to -15 degrees Fahrenheit. Comes in poly bag.