Ice melt and concrete in Colorado: what to use and what to avoid
Updated October 20, 2026. Live numbers refresh hourly.
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For most Colorado driveways older than a year, plain sodium chloride (rock salt) used sparingly is the least damaging common deicer for good-quality concrete, calcium chloride is the choice when pavement is below about 15°F, and new concrete in its first winter should get sand, not deicer.
- Soil today
- 61°F
- +3.8°F over 7 days
- Last 72 hours
- 0 in
- Snowfall estimate
- Season so far
- 0.0 in
- Normal by now 1.2 in
Live data for Denver, CO. Check your own ZIP below for local numbers.
Our picks
Chosen from the research below and the makers' own listings. We haven't lab-tested them.
- Best for ordinary snow days
Morton Safe-T-Salt Rock Salt, 50 lb (4664)
5°FMorton's melt rating
Plain rock salt is the deicer PACA calls generally acceptable on good, dense concrete used sparingly, and it handles most Front Range snow days, when pavement is above about 15°F.
- Best for cold mornings and shaded steps
Snow Joe Melt 50 lb Calcium Chloride Pellets (MELT50CCP)
-25°FSnow Joe's melt rating
Calcium chloride keeps working to about -20°F pavement temperature (Minnesota Stormwater Manual), so these pellets cover the arctic-front mornings and north-facing steps where rock salt stalls.
- Best for first-winter concrete
Quikrete Traction Sand, 50 lb (115850)
NoneDeicer on the slab
PACA says to keep deicers off concrete less than a year old. Coarse traction sand gives grip with no chemistry at all, and Quikrete says it will not harm concrete surfaces.
- Best for steps and walks
Chapin SaltPro 3-Liter Handheld Ice Melt Crank Spreader (8705A)
3 LHopper
A small hand-crank spreader puts calcium chloride down thinly and evenly on steps and walks, so you use less of it. Less product means fewer extra freeze-thaw cycles in the slab.
Side by side
| Pick | Best for | Maker's melt rating | Practical pavement low (MPCA) | Size | Retailer link |
|---|---|---|---|---|---|
| Morton Safe-T-Salt Rock Salt, 50 lb (4664)Rock salt (sodium chloride) | Ordinary snow days | 5°F | About 15°F | 50 lb bag | Check price at Home Depot |
| Snow Joe Melt 50 lb Calcium Chloride Pellets (MELT50CCP)Calcium chloride pellets (94.8%) | Cold mornings and shaded steps | -25°F | About -20°F | 50 lb bag | Check price at Home Depot |
| Quikrete Traction Sand, 50 lb (115850)Dry, coarse traction sand | First-winter concrete | Doesn't melt | Traction at any temperature | 50 lb bag | Check price at Home Depot |
| Chapin SaltPro 3-Liter Handheld Ice Melt Crank Spreader (8705A)Hand-crank ice melt spreader | Steps and walks | – | – | 3 L (0.8 gal) hopper | Check price at Home Depot |
Melt ratings are the makers' label claims. Practical pavement lows are from the Minnesota Stormwater Manual. A dash means it doesn't apply.
Morton Safe-T-Salt Rock Salt, 50 lb (4664)
Best for ordinary snow days
Plain rock salt is the deicer PACA calls generally acceptable on good, dense concrete used sparingly, and it handles most Front Range snow days, when pavement is above about 15°F.
Why we picked it
- The Home Depot listing names sodium chloride as its chemical. There's no ammonium sulfate or ammonium nitrate, which PACA says will destroy a concrete surface.
- Morton rates it to 5°F. The Minnesota Stormwater Manual puts rock salt's practical pavement low at about 15°F, which covers most sunny Denver-area afternoons.
- Morton sells it in 25 and 50 lb bags; the 50 lb bag is linked here.
Downsides
- Too slow below about 15°F pavement temperature, per the Minnesota Stormwater Manual. Keep calcium chloride for cold mornings.
- Don't use it on concrete in its first winter (PACA, University of Maryland Extension).
- Chapin says the spreaders in this guide aren't meant for rock salt. Spread it by hand or with a spreader made for rock salt.
- What it is
- Rock salt (sodium chloride)
- Maker's melt rating
- 5°F
- Practical pavement low (MPCA)
- About 15°F
- Size
- 50 lb bag
- Model
- Morton 4664
Snow Joe Melt 50 lb Calcium Chloride Pellets (MELT50CCP)
Best for cold mornings and shaded steps
Calcium chloride keeps working to about -20°F pavement temperature (Minnesota Stormwater Manual), so these pellets cover the arctic-front mornings and north-facing steps where rock salt stalls.
Why we picked it
- Listed at 94.8% calcium chloride and 2.5% sodium chloride. PACA lists calcium chloride as acceptable on good concrete in moderation.
- Snow Joe rates it to -25°F. The Stormwater Manual's practical low for calcium chloride is about -20°F, the coldest of the common deicers.
- Pellets suit the Chapin hand-crank spreader below, which Chapin designed for ice melt rather than rock salt.
Downsides
- The University of Maryland Extension says calcium chloride is particularly damaging to newly poured concrete. Skip it the first winter.
- In its answer on the Home Depot listing, Snow Joe warns that excessive amounts can cause flaking, scaling, chipping or cracking of concrete.
- The pellets pull moisture from the air, per the listing, so keep the bag closed between storms.
- What it is
- Calcium chloride pellets (94.8%)
- Maker's melt rating
- -25°F
- Practical pavement low (MPCA)
- About -20°F
- Size
- 50 lb bag
- Model
- Snow Joe MELT50CCP
Quikrete Traction Sand, 50 lb (115850)
Best for first-winter concrete
PACA says to keep deicers off concrete less than a year old. Coarse traction sand gives grip with no chemistry at all, and Quikrete says it will not harm concrete surfaces.
Why we picked it
- Dry, coarse sand made for icy and snow-covered surfaces, per Quikrete and the Home Depot listing.
- Quikrete states it will not harm concrete surfaces.
- It's also the fallback when pavement is too cold for any deicer, per the Minnesota Stormwater Manual.
Downsides
- It melts nothing, so shovel first and expect to re-apply after fresh snow.
- Chapin says its salt spreaders shouldn't be used with sand. Spread it by hand or with a scoop.
- Some recent reviewers on the Home Depot listing say their bag held small gravel rather than sand.
- What it is
- Dry, coarse traction sand
- Maker's melt rating
- Doesn't melt
- Practical pavement low (MPCA)
- Traction at any temperature
- Size
- 50 lb bag
- Model
- Quikrete 115850 (No. 1158)
Chapin SaltPro 3-Liter Handheld Ice Melt Crank Spreader (8705A)
Best for steps and walks
A small hand-crank spreader puts calcium chloride down thinly and evenly on steps and walks, so you use less of it. Less product means fewer extra freeze-thaw cycles in the slab.
Why we picked it
- Chapin built it for steps, sidewalks and areas a larger spreader can't reach.
- Thumb-controlled gate adjustment and a trigger gate, with enclosed gears to keep debris out (Chapin).
- Poly construction, which the Home Depot listing says holds up to ice melt better than metal, and a crank big enough to turn with gloves on.
Downsides
- Chapin doesn't recommend it for rock salt, sand or sand mixes. Pair it with calcium chloride pellets or crystals.
- The 3-liter hopper is for small areas. A long driveway calls for a walk-behind spreader.
- What it is
- Hand-crank ice melt spreader
- Size
- 3 L (0.8 gal) hopper
- Spread width
- 24 in (Home Depot listing)
- Gate
- Trigger, thumb-adjusted
- Warranty
- 1-year limited
- Model
- Chapin 8705A
Why Colorado concrete takes a beating
Front Range winters bring many freeze-thaw cycles: snow melts in strong sun by afternoon and refreezes overnight. Water soaks into the surface, expands as it freezes, and breaks off the top layer. The result is scaling, the pock-marked, flaking surface you see in spring. The Pennsylvania Aggregates and Concrete Association notes deicers can start and worsen scaling.
Deicers don't just melt ice. They keep more water liquid on and in the slab, so the concrete goes through more freeze-thaw cycles. The less product you use, the less of that you get.
| Deicer | Works down to about | Concrete notes |
|---|---|---|
| Sodium chloride (rock salt) | 15°F | Generally acceptable on good, dense concrete used sparingly (PACA) |
| Magnesium chloride | -10°F | Linked to higher deterioration rates (PACA) |
| Calcium chloride | -20°F | Acceptable on good concrete in moderation (PACA); damaging to new concrete (UMD) |
| Potassium acetate | -15°F | Mostly sold as a liquid |
| Calcium magnesium acetate (CMA) | 20°F | Linked to higher deterioration rates (PACA) |
| Sand or grit | Never melts | Traction only; safe on new concrete |
New concrete: skip deicers the first winter
PACA's guidance is to avoid deicers on concrete less than one year old, and the University of Maryland Extension notes sodium and calcium chloride are particularly damaging to newly poured concrete. If your driveway was poured this year, use plain sand for traction and shovel early and often.
Picking a deicer by temperature
The Minnesota Stormwater Manual lists a lowest practical melting pavement temperature for each product. Rock salt works down to about 15°F; below that it melts too slowly to be worth it. MnDOT notes salt melts more than five times as much ice at 30°F as at 20°F. Calcium chloride keeps working to about -20°F. Sources differ slightly: the University of Maryland table lists rock salt at 18°F and calcium chloride at -22°F.
On most Denver-area snow days, pavement is warmer than the air by midday, and rock salt works. Calcium chloride earns its cost on cold mornings, on shaded north-facing steps, and after an arctic front. Avoid any product with ammonium sulfate or ammonium nitrate on concrete; PACA says those will destroy a concrete surface.
- Shovel first, then treat what's left. Deicer is for the thin layer, not the whole storm.
- Spread thinly and evenly; UMD notes ice melt works best applied before ice forms.
- Sweep up leftover granules once pavement is dry.
- A silane or siloxane penetrating sealer adds protection, per PACA.
Pets, plants and the lawn edge
Every chloride harms turf and plants when it piles up along the drive. Keep the spreader's throw off the lawn and beds. For how this season's snow compares, see the Denver snow season guide, and for contracts, our snow contract guide.
Questions
What ice melt is safe for concrete in Colorado?
No deicer is completely safe. On good-quality concrete over a year old, rock salt or calcium chloride used sparingly is generally acceptable. Avoid ammonium-based products and keep all deicers off concrete in its first winter.
Does magnesium chloride damage concrete?
The Pennsylvania Aggregates and Concrete Association lists magnesium chloride among deicers shown to cause higher rates of concrete deterioration.
At what temperature does rock salt stop working?
The Minnesota Stormwater Manual puts its lowest practical pavement temperature at 15°F. It can technically melt lower but works too slowly to be useful.
What should I use on a brand-new driveway?
Plain sand for traction, and prompt shoveling. Deicers shouldn't be used on concrete less than a year old.
Bottom line
Keep plain rock salt for ordinary snow days, a smaller bag of calcium chloride for cold mornings and shaded steps, and traction sand for any slab poured this year. Shovel first and spread thin: the less product on the slab, the fewer extra freeze-thaw cycles it goes through.
Check price at Home DepotMorton Safe-T-Salt Rock Salt, 50 lb (4664)
Sources
- Minnesota Stormwater Manual (MPCA): Lowest practical melting temperature
- MnDOT: Maintenance frequently asked questions
- University of Maryland Extension: Melting Ice Safely
- Pennsylvania Aggregates and Concrete Association: Protecting concrete from deicer damage
- Morton Salt: Safe-T-Salt rock salt ice melt (product page)
- Home Depot: Morton Safe-T-Salt 50 lb rock salt (4664) listing
- Home Depot: Snow Joe MELT 50 lb calcium chloride pellets (MELT50CCP) listing
- Quikrete: Traction Sand (No. 1158) product page
- Home Depot: Quikrete 50 lb Traction Sand (115850) listing
- Chapin: SaltPro 3-liter handheld ice melt crank spreader (8705A) product page
- Home Depot: Chapin 8705A hand crank salt spreader listing
Soil temperatures: NOAA GFS model, 0–10 cm layer. Snow: NOAA and National Weather Service. See how we measure.