Quote:
Originally posted by tmz
 FYI You are already. Prestone Driveway Heat is a Dow product. Anhydrous cacium chloride.(it has less water than the flake)
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Actually it seems to be monohydrate rather than anhydrous. In any case it has less water than the flake (dihydrate) which will make only a diference in concentration of Calcium and Chloride per unit of weight
