Deicers work by chemically lowering the freezing point below 32 degrees to melt ice. Regular salt (sodium chloride) is the best know & proven deicer, but it's not the best choice if your concerned about the environment, or if temperatures get well below 32 degrees F.
Avoid damage with any deicer by following the application instructions & quickly removing the ice once melted from the area. Deicers are not intended to be used alone, they are meant to be an aid in the removal process. Here are 3 types of deicers.
Sodium Chloride (NaCl)
- Irregularly shaped crystals
- Considered chemically safe for use on concrete, but may cause freeze-induced damage to other masonry
- Lowest effective temperature 20 degrees F.
- Leaves a white powdery residue when it dries
Toxic to vegitation
Magnesium Chloride (MgCl2)
Flake form less effective than pellets
May cause freeze-induced damage to masonry
Lowest effective temperature 5 degress F.
Leaves no powdery residue
Safer for humans, animals, vegitation, & environment, compared to other deicers
Calcium Chloride (CaCl2)
Flake form less effective than pellets
Poses least threat of freeze-induced damage to masonry
Lowest effective temperature 25 degress F.
Used as directed will not harm vegetation
Leaves harmful residue on carpet, tile, shoes, etc.
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