Pros and Cons of Using Magnesium Chloride for Driveway Ice Removal
Don’t let icy steps get you down—weigh the pros and cons of one popular deicer
Highlights
Magnesium chloride is one of many popular ice removal agents, ideal for use in extremely low temperatures.
This chemical compound is more effective than rock salt at removing ice from driveways.
Magnesium chloride is fast-acting, minimally corrosive, and environmentally-friendly.
Some drawbacks of using magnesium chloride include its higher cost and the need to apply it in larger amounts.
No one likes to go slipping and sliding down the driveway in the winter. You can keep outdoor surfaces safe during the winter by using magnesium chloride for driveway ice removal. However, if you’re unsure if this compound is right for you and your family, learn more about the pros and cons of this deicing option to determine whether it’s the right fit for your home.
What Is Magnesium Chloride Ice Melt?
Magnesium chloride is a naturally occurring salt that lowers the freezing point of water. Magnesium chloride melts ice quickly and efficiently due to its hygroscopic properties, meaning it absorbs moisture easily. When you apply this material to icy surfaces, it transforms into a brine by drawing in moisture from the surrounding air, resulting in the rapid melting of the icy layer. You can find magnesium chloride in small and large quantities at most home improvement stores.
| Pros of Magnesium Chloride | Cons of Magnesium Chloride |
|---|---|
| Works in low temperatures | More expensive than other ice removal methods |
| Causes limited corrosive damage | Need to apply in larger quantities |
| Leaves less residue than other methods | |
| Fast-acting melting | |
| Causes less damage to green spaces | |
| Less likely to cause skin irritation |
Pros of Magnesium Chloride Ice Melt
When it comes to making your walkway safe for snowball fights and heading out to the car, magnesium chloride has some major ice-melting benefits.
1. Effective at Low Temperatures
Magnesium chloride is an effective solution for icy walkways, stairs, and driveways down to about -5 degrees Fahrenheit.
2. Less Corrosive
Magnesium chloride causes less corrosive damage to concrete, stone, tiles, and outdoor vegetation than some other ice removers. Since it’s naturally occurring, magnesium chloride is considered environmentally friendly.
3. Leaves Less Residue
Ice melt and rock salt products can be messy. When the salts dissolve into a brine, they can adhere to shoes and leave unsightly messes on indoor surfaces. Magnesium chloride leaves less residue than other products and is less likely to make it from the outdoors to the indoors.
4. More Effective Than Rock Salt
Magnesium chloride can melt ice and snow twice as fast as rock salt, another common deicer. The quicker action means magnesium chloride is better for heavily trafficked areas.
5. Gentle on Landscaping and Vegetation
Salts from deicers build up over the winter. When snow and ice begin to melt and the water runs off, these salts can damage grass and other vegetation. Magnesium chloride is gentler on greenery than other options, resulting in less damage to your outdoor green spaces.
6. Gentler on Skin
Magnesium chloride is less likely to cause skin irritation than other deicing options, making it a safer choice if you have pets or children who may come into contact with the material. Also, it is less likely to damage your skin during application, though wearing gloves and eye protection is still advised.
Cons of Magnesium Chloride Ice Melt
However, depending on your needs, magnesium chloride may not be the ice melt solution for you.
1. Cost
Magnesium chloride is more expensive than both calcium chloride and rock salt. Magnesium chloride generally costs $20 for 25 pounds compared to $20 for 50 pounds of calcium chloride or $10 for 50 pounds of rock salt.
2. Larger Quantities
You’ll need to apply magnesium chloride in higher quantities than other ice melt products like calcium chloride. With the higher cost, magnesium chloride might not be an economical solution if you live in a high-ice area.
Alternatives to Magnesium Chloride
Magnesium chloride is only one effective option for ice removal. Depending on your ice-removal needs, you may find that one of these other alternatives is better for the job. Make sure to weigh the pros and cons before using another de-icing method, including these options:
Potassium chloride
Calcium chloride
Snow melting mats
Hot water
Using a shovel or other types of snow removal equipment
Homemade solutions (sand, coffee grounds, vinegar, rubbing alcohol, fertilizer, etc.)
Is Magnesium Chloride Ice Melt Right for You?
Magnesium chloride is ideal for homeowners who want a fast-acting, less corrosive, and environmentally friendly option. If you live in an area with extremely low temperatures and icy conditions, spending a bit more on magnesium chloride may be worth the investment. Before using magnesium chloride, make sure to have a thorough understanding of how to safely use it on your property.
Even though brands often advertise magnesium chloride products as safe and natural, it's still best to prevent contact with your skin, eyes, and mouth. On top of this, you're working with slippery surfaces in the cold, so it's in your best interest to wear gloves, work boots, and protective clothing anyway. If you choose liquid magnesium chloride, goggles and a mask are necessary as well. Or hire a local snow removal service to deice your walkways to ensure best results.
Frequently Asked Questions
Both rock salt and ice melt are naturally occurring salts. Rock salt is sodium chloride, which is the same as table salt. Ice melt products can be made from a combination of salts like magnesium chloride and calcium chloride or can be those salts alone.
Rock salt comes in large crystals, so it helps provide traction on icy surfaces, whereas ice melt products need to be mixed with sand to provide traction. Ice melt products work at lower temperatures than rock salt, so they might be a better choice if you have a harsh winter climate.
Magnesium chloride is a relatively gentle ice melt product and, if used correctly, should not cause much damage to your property. The most important thing is to be sure you apply it according to the manufacturer’s instructions and don’t use too much.
Store ice melt in an air-tight and water-resistant container away from sunlight. Choosing a proper container and storage area will prolong your ice melt and keep animals or children from getting into it in between uses. Also, always double-check the label of your product for specific storage recommendations.