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How Effective is Rock Salt?

Pavement Temp(F) How Much One Pound of Salt Melts Melting Time
30 46.3 lbs of ice 5 minutes
25 14.4 lbs of ice 10 minutes
20 8.6 lbs of ice 20 minutes
15 6.3 lbs of ice 1 hour
10 4.9 lbs of ice Salt becomes ineffective and will most likely blow away before it melts anything.
5 4.1 lbs of ice Salt becomes ineffective and will most likely blow away before it melts anything.
0 3.7 lbs of ice Salt becomes ineffective and will most likely blow away before it melts anything.
-6 3.2 lbs of ice Salt becomes ineffective and will most likely blow away before it melts anything.

Key Points:

  • Everthing is based off of pavement temperature. Air temperature and wind chill has no bearing on effectiveness of salt.-
  • As the temperatures decrease, you have to decide whether to apply more salt per area, which is not cost-effective or sometimes practical, or choose another form of de-icer.


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