Crystal Salt Type A De-Icing Dissolves evenly Smooth, free-flowing Size: 25Kg Meinsalz Natural Granular Type A Deicing Rock Salt 25Kg Bag (De-Icing) Meinsalz Granular Type A is a high quality mined rock salt which has a high sodium chloride content of 99% and comes in various grain sizes. De-icing salt can be used during the winter time to be spread on paths and roads to minimize personal injury and material damage caused by snow and ice. During snowfall first scrape the snow off the area for de-icing, then spread the salt. Approx 10-20g of de-icing salt per sqM is generally sufficient but it may be necessary to increase this in extreme winter conditions where black ice or heavy frost may be present.