By far, the most popular de-icing products are rock salt and ice melt. Both are used to melt ice, but they're two very different products with distinct chemical compositions that work differently. 

Rock Salt vs. Ice Melt: How Are They Different? 

What is Rock Salt?

Otherwise known as halite, rock salt is the chemical composition of sodium chloride. It's essentially the same thing as table salt, but it's not purified for human consumption. 

Rock salt works by lowering the freezing point of water, forming a salt and water solution known as brine. This solution flows under the ice and breaks the bond between the ice and the surface, such as concrete or pavement. 

What is Ice Melt?

Ice melt also contains sodium chloride, but its chemical composition often includes magnesium chloride pellets and calcium chloride pellets. It has the appearance of fine-grain sand or tiny flakes. 

Typically, ice melt is applied to the surface before ice or snow forms. It lowers the freezing point of water, preventing the future buildup of ice or breaking pre-formed ice into liquid slush. 

Each has its effective melting temperatures, de-icing capabilities, and potential environmental effects:

Calcium chloride is best for facilities that experience extremely low temperatures

Magnesium chloride is better for facilities concerned with the environment

Blended ice melts are formulated to use the best attributes of each chemical compound

Rock Salt vs. Ice Melt: How Do They Compare?

1. Price

Rock Salt - Rock salt is one of the cheapest methods for melting ice. On average, rock salt costs anywhere from $10 to $15 for a 50-pound bag, depending on the area of the country you live in. 

Ice Melt - The price of ice melt starts at around $13 for a 50-pound bag and can cost as much as $25 per bag. Some companies offer 40-pound bags to help offset the cost, even though it's less product for the same price. 

Conclusion

Winner: Rock salt

2. Parking Lot or Vehicle Damage 

Rock Salt - Rock salt provides traction on ice, even as it works to melt it. Chunks of rock can also grind against the surface and damage concrete or pavement in a parking lot or drive over time. 

Unfortunately, rock salt is extremely corrosive and can cause extensive damage to vehicles, roads, and concrete. If you live in a region of the country with frequent snowfall or ice, this may be an issue. 

Ice Melt - Because of its chemical composition, some people believe ice melt is bad for asphalt. Ice melt can have a long-term effect on concrete and asphalt and be sensitive to different forms of chemicals. 

Additionally, ice melt has less of a corrosive effect on vehicles. It can damage a car over a few years, but the effects aren't very extreme and happen slowly. 

Conclusion

Winner: Ice melt

3. Melting Speed

Rock Salt -  Rock salt can effectively melt ice in temperatures down to 25 degrees Fahrenheit, seven degrees lower than the freezing point. For this reason, it can be used to prevent the accumulation of salt on surfaces. 

Ice Melt - Ice melt, especially varieties including calcium chloride, can lower the freezing temperature of the ice in extremely cold temperatures. Some ice melts are engineered to form a brine and generate heat. 

Conclusion

Winner: Ice melt 

Rock Salt vs. Ice Melt: What Should You Choose?

The last thing anyone wants to think about is snow and ice. It’s officially time to stock up on de-icing products that protect not only your business but also your employees and guests. 



Ultimately, the choice between ice melt and rock salt should depend on your specific set of needs. You'll also want to consider your local climate. 

Rock salt is best if you're looking to save money or want a product that provides instant traction on snow and ice. However, it can corrode concrete and metal and can be extremely toxic to plants and animals. 

Ice melt is fast-acting and works to melt ice faster than rock salt. It may not increase traction on snow or ice, but it's eco-friendly, and most are safe for use around children, plants, and animals. 

Enviro USA can not only help you decide by having our technicians visit your site/s but also by going over the options and making sure the best is picked for your specific needs.

Call Enviro USA at 866-564-1414 or visit our website at www.envirousa.com today to set up a meeting.

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