Seasoning slippery sidewalks with sidewalk salt will cause ice to melt, but the wrong kind of salt can also cause sidewalk surfaces to disintegrate. When buying salt for sidewalks, always choose salt made from potassium chloride. This type of sidewalk salt will melt ice without damaging concrete surfaces the way sodium chloride does. For best results, purchase potassium chloride well in advance of winter storms, mix it with playground sand and keep a supply stored near each entrance to your home. Choosing the right sidewalk salt can extend the life of your sidewalk and keep ice away.