Seal concrete before winter and choose ice melt wisely.

By CO Springs Concrete · Updated September 2026 · 9 min read

Why seal concrete before winter in Colorado Springs?

Concrete is porous. When a soaked slab freezes, the water in its pores expands as it turns to ice and stresses the surface. Repeat that all winter and the surface can flake off. That is called scaling.

The National Ready Mixed Concrete Association (NRMCA) says deicing chemicals make scaling worse, because they keep the surface wetter and add freeze-thaw cycles. Air-entrained concrete helps: millions of tiny air bubbles give the ice room to expand. We use an air-entrained exterior mix on every job for that reason. A sealer adds a second layer of defense by keeping water and salty brine out of the pores.

Timing matters. The National Weather Service office in Pueblo lists October 2 as the mean date of Colorado Springs' first fall freeze, and its records show one as early as September 1, 1911. NRMCA calls late summer, after a few dry days, an ideal time to apply sealer.

How soon can you seal new concrete?

New concrete needs time before sealer and before salt. Guidance varies by product, so the label on the can governs.

• Penetrating sealers: a South Dakota DOT guide, citing the Portland Cement Association's Design and Control of Concrete Mixtures, says to allow at least 28 days before sealing new concrete. W. R. Meadows says to wait 14 to 28 days for best results with its INTRAGUARD silane/siloxane sealer.
• Cure-and-seal acrylics: some are made for fresh concrete. W. R. Meadows' DECRA-SEAL goes on once surface water has disappeared, and its water-based DECRA-SEAL W/B calls for new stamped concrete at least three days old.
• Ice melt: NRMCA says to avoid deicing chemicals in the first winter and use clean sand for traction. The South Dakota DOT guide sets a 30-day drying period before deicers touch new highway concrete. For a driveway poured this year, follow the first-winter rule.

NRMCA also cautions against pouring exterior concrete late in the fall if it will freeze while still saturated. If your slab is new, follow the cure instructions and dates from your contractor; we give them to every customer. For the first days after a pour, see what happens on pour day.

Penetrating or film-forming: the best concrete sealer for freeze-thaw

Sealers fall into two broad groups.

Penetrating sealers (silane, siloxane, silicate)

Silanes and siloxanes soak in and coat the pore walls so they repel water. Water and the salt it carries stay out, but vapor can still escape, so the slab breathes. Silicates work by blocking pores. These sealers leave little or no surface film, so the look barely changes.

For exterior slabs that see deicers, NRMCA recommends a breathable silane or siloxane sealer. Research summarized in the South Dakota DOT guide found siloxanes especially effective at slowing deicer penetration, with silanes also helping. An Oregon DOT study recommends penetrating sealers to protect both new and existing concrete.

Film-forming sealers (acrylic, polyurethane, epoxy)

Acrylics, urethanes and epoxies form a coating on top. They deepen color and add sheen. The American Society of Concrete Contractors (ASCC) decorative sealer guide notes that penetrating sealers are typically not used on stamped concrete, because they do not protect the antique release color. If you have a stamped concrete patio, it likely has a film-forming sealer. For choosing a finish, see stamped vs stained concrete.

The trade-off is traction and wear. An Iowa DOT-sponsored report notes surface coatings can reduce skid resistance and wear off under traffic. W. R. Meadows warns its acrylic DECRA-SEAL may become slippery and recommends adding its grit additive. ASCC says to use an anti-skid additive made for your sealer, not sand, and that even a gritty sealed surface is slippery under ice. It also recommends breathable, non-yellowing sealers for decorative work.

How often should you seal stamped concrete?

There is no single number. ASCC's rule of thumb for acrylic-sealed decorative concrete is about every 2 to 3 years in high-traffic, sun-exposed areas and 4 to 5 years in lighter use.

W. R. Meadows lists the signs an acrylic is worn: lost gloss, surface damage, and water soaking in instead of beading. ASCC adds faded or blotchy color, especially when wet. It names sunlight and deicing salts as causes of breakdown, so a sunny, salted driveway may need it sooner.

When is it too cold to seal concrete?

Product data sheets set the limits:

• INTRAGUARD (silane/siloxane): 40°F and rising up to 95°F and falling, with no rain for six hours.
• Sikagard SN-40 (silane): surface between 40°F and 90°F, with no rain expected for 4 to 6 hours.
• DECRA-SEAL (solvent acrylic): surface between 40°F and 90°F, out of direct sun and high heat. Its water-based version: not if it will drop below 40°F within four hours.
• ASCC guide: water-based sealers at 45°F and rising, up to 90°F, and no rain or condensation for 12 hours. It calls 50 to 65°F ideal.

The concrete must also be dry. ASCC warns a slab can hold water after washing even when it looks dry, and sealer on wet concrete can turn white. With the average first freeze in early October, plan your window for September.

Which ice melt is safe for concrete?

No ice melt is harmless.

Ammonium nitrate and ammonium sulfate

Do not use them. NRMCA says they are chemically aggressive and destroy concrete surfaces. Read the ingredient list before you buy.

Magnesium chloride

NRMCA puts magnesium-based salts on the same do-not-use list. In lab work summarized by the South Dakota DOT, concentrated magnesium chloride chemically attacked cement paste, causing expansion, cracking and strength loss. An Oregon DOT study found bridge decks exposed to it lost significant strength, and that the damage often does not show on the surface.

You may not be the one putting it down. The City of Colorado Springs uses liquid magnesium chloride on main streets before and after snow. NRMCA notes road salts get tracked onto driveways by cars, and advises hosing off those deposits when conditions permit.

Calcium chloride and rock salt

NRMCA considers calcium chloride and sodium chloride (rock salt) acceptable for concrete in moderate amounts. The DOT research adds a caution: concentrated calcium chloride caused chemical attack similar to magnesium chloride, while sodium chloride brine had minimal effect on the paste but is more corrosive to steel. A 2001 Colorado DOT literature review concluded every deicer involves trade-offs. Whatever you use, use less. Lower concentrations caused less damage.

Sand, shoveling and drainage

Michigan State University's grounds team advises removing snow before it gets packed down or refreezes. Clean sand adds grip. Watch where meltwater goes: NRMCA says poor drainage that lets salt solution sit on the slab raises the risk of scaling. Pile snow where it drains away, not where it melts across the driveway and refreezes.

A fall checklist to winterize your concrete driveway

1. If any concrete was poured this year, follow your cure dates and plan on no deicers this winter.
2. Look for damage. Sealer will not fix scaling or open cracks; see why concrete cracks in Colorado Springs.
3. Do a water test. Beading means the sealer is working. Darkening and soaking in means it is time.
4. Clean the slab. Remove oil, dirt and old curing compound. On stamped work, ASCC says to remove most powdered release first.
5. Let it dry for a few days after rain or washing.
6. Pick the sealer type: breathable silane or siloxane for plain concrete, or a compatible decorative sealer for stamped and colored slabs.
7. Check the forecast against the label, including overnight lows and rain-free hours.
8. Apply thin coats. ASCC says over-application causes bubbling, cracking and whitening.
9. Keep cars off for at least 24 hours, as ASCC recommends.
10. Stock sand and a deicer free of ammonium and magnesium before the first storm.

Should you seal concrete yourself or have it done?

A plain broom-finish driveway, walk or patio with a penetrating sealer is a reasonable DIY job. The main risks are sealing damp concrete or sealing outside the label's weather limits.

Stamped and colored concrete is less forgiving. Film-forming sealers can bubble, peel or turn white when applied too thick, on damp concrete, or in hot sun. ASCC notes whitening from a heavy coat may only come out by grinding or blasting, and its guide says resealing is best done by a qualified contractor.

If your slab is already flaking, heaving or cracked through, sealer will not bring it back, and it may be time to talk about replacement. We pour concrete driveways and stamped patios on an excavated, compacted base with saw-cut control joints. Every job starts with a free on-site estimate and a clear written quote.