Sealcoating Fort Collins
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Driveway Sealing and Sealcoating in Fort Collins, CO
Driveway sealing is a thin coat of asphalt-based or acrylic sealer spread over the top of a drive so that sun, water and fuel drips work on the coating instead of the binder that holds the stone together. That matters in Fort Collins because the CSU campus station records about 131 days a year when pavement freezes overnight and thaws by afternoon, and each crossing works on whatever water has soaked into the surface. A sound coat closes the surface pores and, in SealMaster's words, prevents oxidation of the asphalt binder. Seal coating is maintenance, not repair: open cracks need hot-pour crack filling first, and a drive with soft or sunken spots needs patching before any sealer can help it.
$0.30 - $1.50 per sq ft; $220 - $370 for a 720 sq ft drive at the 2022 local rate · full pricing guide
A sealing day starts at the edges and the stains. Grass that has crept over the asphalt is cut back, the surface is blown and swept, and oil drips get a primer, since sealer will not grip petroleum. Cracks a quarter inch and wider are filled and left to set. The first coat is then worked into the surface, often with a squeegee so it reaches the pores, and the second goes on once the first has dried; SealMaster calls for two coats and a third on heavy-traffic areas. At the street, the concrete approach and the garage slab are taped or boarded off. Sealer is made for asphalt and has no job to do on concrete.
The weather sets the calendar. SealMaster asks for 50 degrees and rising for 24 hours, no rain in that time and a full day before traffic. On the campus normals, May still has 25.8 nights at or below 50 degrees and September 19.0, while June drops to 9.5 and July and August to fewer than 3. May is also the wettest month of the year at 2.72 inches. That makes June through August the dependable stretch, with work starting in the morning so the coat can set before any afternoon thunderstorm.
Product choice is a local question as well. No coal-tar ban applies in Colorado, Larimer County or the city, going by the national list kept by Coal Tar Free America, but the USGS reports that coal-tar sealcoat carries roughly a thousandfold the PAH content of asphalt-based products, and that runoff collected as long as 42 days after a coal-tar application killed test minnows and water fleas. Stormwater from Fort Collins driveways reaches creeks and the Poudre untreated. Asphalt-emulsion and acrylic sealers sidestep that question, and a written bid should name whichever product is planned.
Price follows square footage and scope. HomeBlue's 2022 Fort Collins survey rate was $0.30 to $0.50 per square foot, or $220 to $370 for a 720 square foot two-car drive, while 2026 national guides quote $1.25 to $1.50 per square foot and HomeAdvisor lists a $290 minimum for small jobs. The cost page sets the sources side by side. The spread is the reason to ask each bidder for the measured area, the product and the number of coats in writing.
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What to check on a Fort Collins drive in late May
By late May the snowiest month is behind the drive and summer bookings have not yet filled, so the winter's effects are easy to read on a dry afternoon and again after a rain.
- The wheel paths have gone lighter than the strip down the middle
- Fine stone and sand have gathered at the concrete approach after the spring melt
- Runoff from the roof soaks in and leaves dark stains that linger into the afternoon
- The joint between the asphalt and the concrete approach has opened into a gap
- Hairline cracks cover the sunniest, most exposed part of the drive
- Drips under the parked car have left soft, dull patches
A drive showing three or more of these has a surface ready for a coat, provided the cracks are filled first.
Three answers to a gray Fort Collins driveway
Which answer fits depends less on the color of the surface than on what is under it and where the water goes.
Coat it this summer
The base is firm, water runs off to the street or the lawn, and the cracks are hairline. Two coats between June and August, with the concrete approach masked off.
Fix the water first
Snowmelt pools at the garage slab or along a lawn edge that sits higher than the asphalt. Regrade, extend the downspout or build up the edge, then fill and seal; a coat over a wet spot does not last.
Rebuild before coating
Plates of alligator cracking, sunken wheel paths or a soft area over clay mean the base has failed. Patch full depth or replace, and seal the new asphalt once it has cured.
Sealing is the least expensive of the three, and it only works when the other two do not apply.
Driveway Sealing and Sealcoating FAQs
How long does a sealed driveway need before a car can use it?
SealMaster puts it at a full day after the final coat, and that is a floor rather than a target. A coat applied on a cool May or September day, when nights on the campus record often fall to 50 degrees or below, or on a drive shaded by a large tree, can stay soft longer. Walking on it is usually fine within hours. Turning the front wheels of a parked car on a coat that is still soft scuffs it, so one night parked on the street is the simple answer.
Why should the concrete approach be masked during sealing?
Because it is concrete, and in Fort Collins it is also public right-of-way. The Larimer County Urban Area Street Standards call for concrete from the edge of the street to the edge of the right-of-way, and work on that approach needs a city Sidewalk and Drive Approach Permit. Asphalt sealer adds nothing to concrete and leaves a dark stain that wears off unevenly. A careful crew tapes or boards the joint and stops the coat on the asphalt side.
Why do quotes for the same Fort Collins driveway differ so much?
Mostly scope, sometimes minimums. One bid may include two coats, hot-pour crack filling and oil-spot priming, and another one thin coat with none of that. HomeAdvisor's 2026 guide lists a $290 labor minimum for 250 square feet and $1.25 to $1.50 per square foot overall, while a 2022 local survey found $0.30 to $0.50. Asking every bidder for the measured square footage, the product, the coats and the crack footage turns two lump sums into numbers that can be compared.
Is September too late to seal a Fort Collins driveway?
Not always, but it is the edge of the season. On the campus normals, 19 of September's 30 nights fall to 50 degrees or below, and there is a one-in-ten chance of a 32-degree night by September 22; the median first freeze is October 6. A warm, dry spell with a clean 24-hour forecast still works. If September turns cool and wet, filling the cracks now and sealing next June is the safer plan.
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