How Ice Melters Work
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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). |
When to Apply Ice Melters
Whenever the safety of pedestrian or vehicular traffic is threatened by a buildup
of snow or ice, action should be taken to reduce the risk. The use of granular
ice melters should be part of an ice control strategy, along with physical removal
of snow and ice.
By applying an ice melter before precipitation begins, you can prevent ice
from bonding to the traffic surface, and simplify shoveling or plowing. However,
pre-application may cause a brine to refreeze under a heavy snow pack if shoveling
or plowing does not occur in a reasonable time. Pre-apply only if you are sure
physical snow removal can be accomplished soon after.
Here are some guidelines for applying ice melter after precipitation has fallen:
Precautions
Apply at labeled rates. Use a spreader or application unit. Spread evenly.
Do not over-apply, especially around vegetation, metals and concrete.
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