Why sealing matters more here than most places
Pour a driveway in Aurora and the first winter is the hard one. Water soaks into the pores of unsealed concrete, freezes, expands, and pops off the surface. Salt from road deicers rides in on the water and makes it worse. By spring you've got a pitted, scaly patch right where the cars park.
A sealer slows that down. It isn't magic and it doesn't make concrete waterproof, but it cuts how much water and salt gets in, and that's where most of the damage starts. On the slabs we inspect, the ones that were sealed on a schedule almost always look better than the ones that never were.
The job itself is simple. We clean the surface, let it dry, and apply the sealer that fits the slab. Sealing typically runs $1.50 to $3 per sq ft. A Clean and seal a 2-car driveway (about 600 sq ft) usually lands at $900 to $1,800. For a driveway that's a small price next to a resurface or a replacement.
The trick is picking the right product. A driveway and a stamped patio don't want the same sealer, and putting the wrong one on is how people end up with white haze, peeling film, or a slippery walk.
Does your concrete need sealing now?
Here's the quick sort. The water bead test below tells you more than looking at color.
Call soon if you see
- Water soaks in and darkens the concrete instead of beading up on top
- A new slab that has cured about 30 days and hasn’t seen a winter yet
- A driveway that has started to show light scaling or sand at the surface
- A stamped or colored patio that looks dull, chalky, or faded
- Control joints and edges where you can see gaps opening up
Usually safe to watch
- Water still beads clearly on a slab sealed within the last year or two
- A slab that is wet, damp, or has standing water under it
- Fresh concrete under about 30 days old that is still curing
- Concrete with heavy scaling or deep cracks, which needs repair before sealing
Two kinds of sealer, two different jobs
Most sealing mistakes come from using the wrong type. Here's how we match them.
Penetrating silane-siloxane for driveways, walks, and plain concrete
This type soaks into the concrete and lines the pores so water and salt can't get in. It doesn't leave a film on top, so it won't peel, and the surface keeps its natural look and grip. That's why it's our default for exterior driveways, sidewalks, and broom-finish slabs. Plan to reseal every 2 to 3 years.
Film-forming acrylic for stamped and decorative concrete
Acrylic sits on top and gives color depth and a wet-look sheen. That's what makes stamped patterns pop, so it's the usual choice for stamped concrete. The downside is wear. A film sealer scuffs and needs resealing about every 2 to 3 years. On a walkway it can get slippery when wet unless we add a grip additive.
Joints and cracks
Sealer on the surface doesn't close a joint or a crack. Those get a flexible joint sealant so water can't run under the slab. Small, stable cracks are covered on our crack repair page. We seal joints as part of most jobs because that's where water gets in first.
Slabs that are too damaged to seal
Sealer protects sound concrete. It doesn't rebuild a scaled or pitted surface. If the top is already flaking away, concrete resurfacing comes first, and sealing goes on after.
The water bead test
You don't need a lab. Pour a cup of water on a dry section of your driveway and watch.
- If the water beads up and sits on top, the sealer is still working.
- If it spreads out and darkens the concrete within a minute or two, the sealer is worn out or was never there.
- If it soaks in right away, the concrete is thirsty and past due.
Try it in a couple of spots, especially where tires roll and by the garage door. Wear shows up there first. Do the test in dry weather on a clean slab. Dirt and oil can fool it.
How we seal concrete
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Check the slab and the age
New concrete should cure about 30 days before sealing. On older slabs we check for oil, old coatings, and any damage that needs repair first.
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Clean and prep
We pressure wash to remove dirt, salt residue, and loose material. Oil stains get treated. Then we let the slab dry completely. A damp slab traps moisture under the sealer and can cause a cloudy, milky look.
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Seal joints and cracks
Open joints and small cracks get sealant before the surface coat goes on, so water has fewer places to enter.
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Apply the sealer
We spray or roll the product in thin, even coats. Too thick is the most common mistake, and it causes bubbles, haze, and peeling on film sealers. Penetrating products soak in and are wiped back if they puddle.
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Cure and re-open
Foot traffic is typically fine within hours. Cars usually wait a day or so, depending on the product and the weather. We'll tell you the specifics for what we used.
What affects the price of concrete sealing
Sealing typically runs $1.50 to $3 per sq ft. A few things change that.
- Size of the area
Bigger flat areas cost less per square foot. Small walks and stoops have the same setup time as a large driveway.
- Cleaning and prep
Heavy oil, rust stains, mildew, or old failing sealer take extra time to strip and clean.
- Type of sealer
Penetrating silane-siloxane is the standard and is what the base price assumes. Film-forming acrylic for stamped work costs more, especially with color-enhancing or grip additives.
- Joint and crack sealing
The more joints and cracks there are, the more sealant and labor go into the job.
- Access
Easy access for a sprayer and hoses is simple. Fenced yards, tight spaces, or lots of landscaping to protect add time.
- Repairs first
If the slab needs repairs before it can be sealed, that is priced separately. Sometimes a full resurfacing job makes more sense.
When to seal in Aurora
Timing matters as much as the product. A good rule is to seal in dry weather, with surface and air temperatures generally above about 50 F during application, and wait until a new slab has cured around 30 days.
Winter
Too cold and too damp. Sealers need warmth to cure properly and the slab has to be dry. We don't recommend sealing in deep winter, and don't use salt on a new slab if you can avoid it.
Spring
Spring works once nights warm up and the slab has dried out from snowmelt. It's a good time to reseal after a winter of salt, and to run the water bead test.
Summer
Summer is fine, but avoid the hottest part of the day. Sun and wind can flash a film sealer too fast and leave bubbles or streaks. Early morning works well.
Fall
Fall is the window that matters most. Seal before the first snow so the concrete goes into winter protected. A new slab poured in late summer should be sealed in this window, right after it cures.
Aurora salt, clay, HOAs, and permits
Deicing salt and freeze-thaw
Aurora gets many freeze-thaw cycles each winter, and road deicers come home on tires and drip onto the driveway. Salt pulls water into the surface and speeds up scaling. A penetrating sealer is the cheapest protection you can add. Keep deicers off new concrete its first winter, and shovel when you can.
Clay soil movement
Sealing can't stop the ground from moving. It slows water entry at the surface and joints, but cracks from soil movement are a separate problem. See our concrete crack repair page for those.
HOA considerations
A clear penetrating sealer rarely draws HOA attention. A high-gloss or color-enhanced sealer can change how a patio or driveway looks, and some associations care. Check before you pick a sheen.
City of Aurora concrete
Sealing your own driveway or patio doesn't involve the city. The public sidewalk, curb, and gutter are maintained by the city. If you're working in the right-of-way, confirm what's allowed with Aurora Public Works first.
Concrete Sealing FAQs
How much does concrete sealing cost in Aurora?
Sealing typically runs $1.50 to $3 per sq ft. A Clean and seal a 2-car driveway (about 600 sq ft) usually costs $900 to $1,800. Stripping old sealer, oil removal, and film-forming products for stamped work cost more.
How long should I wait to seal new concrete?
About 30 days. Sealing too early can trap moisture and cause a cloudy look. If your slab was poured late in the season, seal it in the fall window before the first snow.
How often do I need to reseal?
Every 2 to 3 years for most driveways, walks, and stamped patios. The water bead test will tell you when. If water soaks in and darkens the concrete, it's time.
What temperature is too cold to seal?
Application temperatures are generally above about 50 F, and the slab should be dry. Check the product label for the exact range. Cold or damp slabs can leave haze or poor cure.
Will sealer make my driveway slippery?
Penetrating sealers don't change the grip of a broom finish. Film-forming acrylic can get slick when wet. We add a grip additive on walks, steps, and pool-side areas.
Can sealer fix a flaking driveway?
No. Sealer protects good concrete. If the surface is scaling or pitted, it needs resurfacing first. Sealing after the repair protects the new surface.