50 lb bags. Winter Melt® is the ice melt standard--a natural mineral made up of Sodium Chloride. It is widely used to remove snow and ice from properly cured/sealed sidewalks and parking lots. Winter Melt® works down to 5°F/-15°C. It is specially screened to provide a unique blend of large and small melting crystals (Halite). The small crystals melt quickly while the larger crystals provide long-lasting action. Winter Melt® ice melter is cost-effective compared to enhanced blends, and does not leave an oily residue.