THE NICER DE-ICER. The RS50 Halite De-Icing Rock Salt is comprised of specifically sized sodium chloride crystals designed to quickly de-ice pavements, driveways and other road surfaces, making them much safer and easier to traverse. Frequent use throughout snowfall periods prevents ice from forming on ground surfaces, too. Can be conveniently dispensed directly out of the bag or into a handheld or wheeled salt spreader.