Sealing your asphalt driveway protects it from damage caused by weather, traffic, and the freeze-thaw cycles of colder months. While fall is a popular time to tackle outdoor maintenance, is it really the best season for sealing? Consider the timing and weather conditions as you consider whether or not you still have time to begin this project.

Why Fall is a Good Time for a Sealcoating Project

While many homeowners focus on spring as sealcoating season as a factor of summertime curb appeal, fall is really the prime time for driveway sealing. Temperatures in early autumn tend to be mild, hovering within the ideal range for most sealants to bond properly with asphalt. Typically, sealant manufacturers recommend application in temperatures between 50°F and 85°F, conditions often found in fall, which can prevent issues such as cracks, peeling, or improper curing.

Autumn also brings fewer intense UV rays compared to the extremes of summer. UV exposure can dry out and fade asphalt, causing it to become brittle over time. By applying driveway sealer in the fall, you’re adding a protective shield that wards against direct sunlight damage while also safeguards your driveway against the harsh elements of winter. The combination of cooler temperatures and moderate sunlight can give you the best chance for a long-lasting sealant application.

Spreading sealant on asphalt.
A coat of sealant can help an asphalt driveway endure the cold winter. Credit: vm2002 / Getty Images

Timing Considerations for Sealing Your Driveway

  • Fall Weather Variability: Early frosts or rain can interfere with asphalt sealers, as rain or frost before the sealant dries will affect adhesion, potentially causing patchiness or requiring additional layers. Make sure nighttime temperatures are still mild.
  • Choosing the Right Weather: Aim for a stretch of dry days with minimal temperature fluctuations. This helps make sure the sealant bonds well with the asphalt during the curing process.
  • Regional Climate Factors: In areas where temperatures drop quickly in late fall, consider maintaining a sealcoated driveway earlier in the season or waiting until spring for optimal results.
  • Avoid Frost Conditions: Refrain from sealing if there’s any chance of frost within 24 hours, as cold temperatures can slow curing, leading to an uneven or weakened sealant layer. In cold climates, this is the main reason you should always avoid sealing an asphalt surface during the winter months.

Man shovels snow in driveway.
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How to Tell If It’s Too Late for a Fresh Seal Coat

Determining if you still have time to seal your driveway before winter depends on both the weather forecast and the existing condition of your asphalt. If you’re seeing extended forecasts with colder temperatures consistently below 50°F, or if nightly temperature continues to dip near freezing, it’s probably best to hold off until spring. Applying sealant in such temperatures can lead to premature failure, leaving your driveway vulnerable to further damage over the winter.

Another good rule of thumb is to consider the condition. Check your driveway for visible cracks, potholes, or an uneven surface texture. If your asphalt has suffered significant wear, leaving it unsealed through winter could allow water to penetrate these flaws, grow moss, and expand the damage as temperatures drop. In this case, early fall might be an ideal time to seal, but if it’s late in the season, consider temporary repairs and plan for a full sealant application when warmer weather returns.

FAQ

What’s the best way to clean my asphalt driveway before sealing it?

For the best sealant adhesion, make sure you clean your driveway thoroughly before sealing. The majority of driveways need a good cleaning! Use a pressure washer or garden hose to remove dirt, stains, moss, and debris.

After cleaning, remember to let the entire surface to dry completely, and remember to then fill any driveway cracks or holes with asphalt filler before adding the coat of sealant. Making asphalt repairs can help reduce areas with substantial damage and minimize potential issues and costly repairs in the future. Cleaning not only improves sealant adhesion but also helps you achieve an even finish.

Moss growing in the crack of an asphalt driveway.
Moisture on driveways can lead to the growth of moss. Credit: Emily Fazio

How often should I apply driveway seal to a residential driveway?

Sealing every 2–3 years is usually sufficient to maintain a protective layer on your asphalt driveway. Oversealing can cause the surface to become too slick and may lead to issues with build-up and peeling. Adjust the frequency based on local weather conditions and the condition of the driveway, as areas with harsh winters may require more frequent sealing.