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How do you sealcoat an asphalt driveway?

Updated August 2026

4–6 hours plus 24–48 hours of cure · Moderate DIY

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The sequence is sweep, degrease, fill every crack, then squeegee two thin coats of sealer, and the job runs 4–6 hours plus 24–48 hours of cure with nothing parked on it. Wait for pavement above 50 degrees, no rain in the forecast for 48 hours, and ideally an overcast sky, because full sun skins the surface before the sealer bonds underneath. Materials for a two-car driveway come to $100–200, and the cycle repeats every 2 to 3 years. Two thin coats always outlast one heavy pour, which cracks and peels as it cures.

What you need

Before you start: Sealer is an irritant that is genuinely hard to get off skin, so wear gloves, eye protection, and boots you are willing to throw away. Work upwind, keep pails off the lawn, and keep everything out of the storm drain at the bottom of the driveway. Keep kids and pets clear until the surface is dry to the touch, typically 4–8 hours. Check the label before you buy: some states and cities restrict coal-tar sealers, and refined-tar-free asphalt emulsion is the safer default regardless.

Steps

  1. Check the calendar first. You need pavement above 50 degrees, 24 to 48 hours of dry weather, and enough daylight that the last coat goes down at least 4 hours before dusk. Late spring and early fall are the reliable windows in most of the country.
  2. Sweep the whole surface, then blow it clean. Anything left behind, down to a single leaf, becomes a bare spot where sealer never bonds.
  3. Scrub oil and transmission stains with degreaser and rinse. Sealer will not stick to oil, and untreated spots bleed back through within a season. Prime stubborn patches with an oil-spot primer.
  4. Fill every crack wider than a pencil line and let the filler set per its label, usually 4 to 24 hours. Sealcoat over an open crack and water still gets underneath.
  5. Mask the garage slab, walkway edges, and any brick you do not want speckled, then mist the driveway lightly damp if the label calls for it. Most water-based sealers bond better to damp, not wet, asphalt.
  6. Stir each pail at least 5 minutes with a mixing paddle and re-stir every 20 minutes. The solids settle fast, and an unstirred pail lays down thin, shiny, and short-lived.
  7. Cut in the edges with a brush, then pour a ribbon across the top of the drive and pull it down in overlapping passes. Work 10-by-10-foot sections and keep a wet edge.
  8. Let coat one dry 4 to 8 hours, then run coat two at a right angle to the first so the pass marks cancel out.
  9. Keep feet off for 24 hours and vehicles off for 48. Wait a full week before turning the wheels while parked in one spot, which scuffs fresh sealer.

Or hire it out

A contractor charges $250–600 to sealcoat a typical two-car driveway, roughly $0.15–0.30 per square foot, usually including crack filling and edge trimming. That is $150–400 over your materials cost, and it buys commercial-grade sealer, a spray rig, and someone else kneeling on hot asphalt. Replacing a failed 600-square-foot driveway runs $3,000–7,000.

Done. Now the part everyone skips: doing it again on schedule. Log it in OnOtto and the next reminder for driveway sealing sets itself.

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Frequently asked questions

How do I tell whether this is the year?

Look at color and texture. Fresh sealer is black; asphalt due for a coat has gone gray, and the individual stones in the surface start to feel loose under your palm. Splash a cup of water on it: soaking straight in rather than beading means the binder is oxidized and open. Most driveways land on a 2–3 year rhythm, and the full breakdown by climate is on how often to sealcoat an asphalt driveway.

Can I sealcoat a brand-new driveway?

Not right away. New asphalt needs 6 to 12 months to cure and release its surface oils, and sealing too early traps them, leaving a soft, scuffing surface that tracks into the garage. Give it a full season, then seal. After that first coat, stretch to the normal interval instead of sealing annually, since over-sealing builds a brittle film that alligators and flakes off in sheets.

Is a concrete driveway the same job?

Different product, different reason. Concrete does not oxidize the way asphalt does, so its sealer is a penetrating silane or siloxane that blocks water and de-icing salt rather than a black surface coating. The interval is longer, typically 3 to 5 years, and application is a sprayer-and-roller job with no squeegee work. See how often to seal a concrete driveway for the schedule.

Will sealing fix the alligator cracking near the street?

No. Interconnected cracks in a web pattern mean the base under the asphalt has failed, usually from water or heavy truck loads, and a quarter-inch coating cannot bridge a structural problem. Those areas need a saw-cut patch at $3–8 per square foot, or a full replacement if they cover much of the drive. Driveway lifespan covers where the line between patching and repaving sits.

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