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Calcium chloride works best for deicing (down to -25 °F) and it releases heat as it dissolves. So, using less means having fewer problems. In terms of usage rates, calcium chloride is less toxic or corrosive than sodium, potassium, or magnesium chloride. Sodium chloride only works down to +20 °F Potassium chloride only works down to +25 °F Magnesium ...

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