vs. Calcium Chloride
While calcium chloride is more expensive, it is less damaging to
grass than sodium chloride, and is also effective at colder
temperatures. It is generally applied at about a third the rate of
sodium chloride, so it goes further if it is not being over-applied.
Urea is not recommended as a de-icer
Urea has been suggested as a substitute for standard de-icing
materials, but its use is not recommended. Urea is a high-nitrogen
fertilizer that can run off with the snowmelt and spring rains,
resulting in pollution of surface and groundwater. And even if it
all stays on your lawn, it could result in an over-application of
nitrogen, which can also burn grasses.
Spring rains can help leach salts from the soil as long as drainage
is good. If the soil adjacent to your hardscape is very compacted,
drainage is likely poor. It can be improved by incorporating organic
matter such as compost to a depth of 6 inches.
Deicer & snow melter descriptions
Mulching leaves when mowing a lawn