If you own property in Concord—whether you’re managing a small business near Todos Santos Plaza or maintaining a residential driveway off Clayton Road—you’ve likely heard a paving contractor recommend sealing your asphalt every two to three years.
That’s not just sales talk.
At APCO Paving Co., we make that recommendation based on decades of hands-on experience dealing with local weather, soil, and traffic conditions unique to Contra Costa County.
Let’s break down the specific reasons Concord pavement contractors like us urge you to stick to that sealing schedule.
Key Takeaways
- Concord’s hot summers dry out pavement fast, so sealing every few years keeps it flexible and crack-free.
- Unsealed asphalt in Concord breaks down quicker from rain, traffic wear, tree roots, and shifting East Bay soil.
- Pavement should be cleaned, patched, trimmed, and cleared before sealing to make sure the seal sticks properly.
- Preventive sealing every two to three years saves money, avoids major repairs, and keeps Concord pavement looking sharp.
Summer Heat Causes Faster Oxidation in Untreated Pavement
Concord’s hot, dry summers—especially in neighborhoods like Sun Terrace and North Concord—speed up the oxidation process in asphalt.
When pavement is constantly exposed to UV rays and high temperatures, the surface oils that keep it flexible and resilient start to evaporate. This causes the pavement to become brittle and gray, which leads to cracking and surface raveling.
Sealing every few years helps replenish protective oils and blocks UV exposure, which slows down oxidation and extends the pavement’s lifespan significantly.
Winter Rains in Concord Worsen Cracks and Potholes if the Pavement Is Unsealed
While Concord doesn’t get the same heavy rainfall as cities closer to the coast, the winter rains we do get—especially in December and January—still pose a serious threat to unsealed asphalt.
Water easily seeps into even the smallest cracks, particularly in lower-lying areas like Monument Boulevard. Once inside, the moisture compromises the base layer and leads to potholes or surface failure.
Regular sealing prevents this by creating a moisture barrier, reducing the risk of water intrusion and structural damage.
Tree Roots and Soil Movement in East Bay Soil Shift Unsealed Pavement More Easily
The clay-heavy soil in Concord and surrounding East Bay areas—especially in older residential zones like Dana Estates—is known for expanding and contracting with moisture changes.
This movement can push up from underneath and damage pavement that isn’t sealed. Add to that the root systems from local species like valley oaks and sycamores, and you’ve got a recipe for surface upheaval.
Sealcoating helps the pavement resist these shifts by keeping the surface more unified and flexible, minimizing stress fractures caused by soil dynamics.
Traffic From Local Commutes and Delivery Vehicles Wears Down Surface Oils
Between daily school drop-offs at Mt. Diablo High and steady delivery traffic around Willow Pass Road, Concord roads and driveways deal with a lot of tire friction. All that movement gradually strips away the top layer of oils and fine aggregates in asphalt, leaving the surface rough and susceptible to erosion.
Pavement sealing restores a protective layer that acts as a buffer against this daily wear, making it essential in high-traffic areas, even for small business lots or residential driveways.
Preventive Sealing Helps You Avoid Major Repairs Later
We’ve worked with plenty of property owners in areas like Cowell and Ellis Lake who waited too long to seal, only to face costly resurfacing or full removal-and-replacement jobs.
Once asphalt reaches a certain level of degradation, sealing won’t be enough—it’s a full reconstruction at that point.
Sticking to a 2–3 year sealing schedule helps preserve the surface integrity and saves thousands of dollars in future repairs, especially when matched with regular pavement maintenance checks.
How to Prepare Your Pavement Before Scheduling a Sealing Service
Before we show up to seal your asphalt, there are a few steps you should take to make sure the job goes smoothly. Here’s what we recommend for Concord property owners.
Clear the Surface of Vehicles, Debris, and Clutter
To get a clean, even application, we need full access to the pavement.
If you’re in a busy spot like downtown Concord or have limited driveway space in the Bishop Estates neighborhood, it’s important to move all vehicles, trash bins, and other items out of the way. Loose debris and clutter can interfere with sealing and cause patchy coverage.
A day or two before your scheduled service, give the area a quick sweep and clear it completely.
Power Wash or Rinse off Built-up Grime and Oil Stains
Over time, asphalt surfaces around Concord accumulate dust, oil drips, and tire residue, especially near intersections like Concord Boulevard and Galindo Street. These contaminants can prevent sealant from bonding properly.
Giving your pavement a thorough rinse or light power wash a day or two before sealing removes surface grime and opens up the asphalt pores so the sealant can soak in and stick.
Just be sure the surface has time to dry before we arrive.
Patch Significant Cracks or Potholes Beforehand
If you’ve got visible cracks or minor potholes, it’s best to patch them before sealing. In areas like Four Corners or the Crossings near Treat Boulevard, we see a lot of surface damage caused by shifting soil or irrigation run-off.
Sealing won’t fix these issues. It only coats the surface. We can help with asphalt repairs, or you can request them ahead of time as part of your service.
Either way, crack and pothole repair is a must for long-term results.
Trim Back Nearby Shrubs, Trees, or Grass Overgrowth
We often run into overgrown plants along the edges of driveways or parking lots, especially in neighborhoods with established landscaping like Canterbury Village. If branches, vines, or grass are brushing up against the pavement, they can interfere with the sealant and leave uneven edges.
Trimming back vegetation ensures we can seal right up to the border for clean, uniform protection.
Check the Forecast and Plan for at Least 24 Hours of Dry Time
Sealcoating needs dry weather and warm temperatures to cure properly. Concord summers usually give us that window, but shoulder seasons like early spring or fall can be hit or miss.
If you’re in an area that gets early morning fog or cooler breezes—like near Lime Ridge Open Space—it’s even more important to aim for a dry forecast.
We always confirm weather conditions beforehand, but double-checking your calendar for dry time helps ensure success.
Protect Your Pavement with Proactive Sealing
At APCO Paving Co., we help property owners across Concord—whether you’re near Meadow Homes Park, Buchanan Field Airport, or tucked into a quiet cul-de-sac—keep their asphalt in top shape with reliable sealing services. We handle everything from surface prep to sealing and crack repair, and we make sure the job fits your schedule and budget.
Ready to protect your pavement before the next hot season kicks in?
Contact us today to schedule your sealing service or request a free quote. Let’s keep your surface safe, smooth, and looking sharp for years to come.
Frequently Asked Questions
How long should I wait after new asphalt is installed before sealcoating it?
For new asphalt in Concord, it’s best to wait at least 90 days before sealcoating. This gives the pavement time to cure properly so the sealant can bond well and perform as expected.
Does sealcoating help protect against oil and chemical spills on driveways or parking lots?
Yes, sealcoating adds a barrier that resists damage from oil, gas, and other vehicle fluids—especially helpful in high-use areas like commercial lots near Concord Avenue or residential driveways with frequent car traffic.
Can I sealcoat asphalt that has already been patched or resurfaced?
You can sealcoat patched or resurfaced asphalt as long as repairs are fully cured. In Concord’s warmer climate, that usually means waiting about four weeks for optimal sealant bonding and long-term surface protection.
How often should commercial parking lots be sealed compared to residential driveways?
Commercial lots in Concord, especially near high-traffic areas like Diamond Boulevard, usually need sealing every 1–2 years. Residential driveways with lighter use can typically stick to a 2–3 year maintenance schedule.
