Pellet Deicer exudes maximum safety with minimum effort. These calcium chloride-based pellets generate exothermic heat to power through thick snow and ice accumulations. They work in temperatures as low as -40°F below zero and prevent refreezing. They are non-corrosive to concrete and will not leave behind a residue or kill grass. These pellets are 36 times faster than rock salt and will melt 46 times their own weight.