After an ice storm or your parking lot has been cleared of snow the pavement can be very slippery. Large trucks with salt sanding units carry salt to your property and broadcast the salt over your parking, loading and drive areas. The salt has a chemical reaction with the ice or snow and melts it away, reinstating the bare pavement. There are many factors that contribute to the salts effectiveness and time frame in which it dissolves. More salt may be needed to melt the ice and snow such as; temperatures getting colder, thick ice, heavy accumulation of snow or a combination of these factors. In some cases a combination of salt and sand are more effective than salt alone as the sand provides instant traction. Ask you professionals what is best for your situation.