When ice melter granules contact ice or snow, they begin to form a brine solution. This brine is central to the melting
process, as it will not freeze initially.
The brine becomes more diluted as it melts the ice or snow, until it eventually refreezes. How long it takes for this refreezing to occur depends on the amount of ice melter applied and the effectiveness of each granule.
Some ingredients melt ice at lower temperatures, and prevent refreezing longer than others. For example, rock salt will melt ice down to -15°C (5°F), while urea will only melt ice down to -4°C (25°F).
Whenever the safety of pedestrian or vehicular traffic is threatened by a build up of snow or ice, action should be taken to reduce the risk. The use of granular ice melters should be part of…