Bare Ground Calcium Chloride pellets, in a 40 lb box, is a powerful ice melter that generates heat as it melts tough ice and snow. It starts to work quickly and can melt ice and snow at temparatures as low as -67F. Provides a reduction in harmful runoff that can contaminate groundwater, making it safer for people, grass and plants, pets and livestock. It is less harmful to concrete and steel as well.