Sealing is cheap, quick and routinely oversold, which makes it one of the few jobs where the honest advice is often to wait. A sealer is a sacrificial surface layer that slows water, oil and chemicals getting into the material below. On asphalt it is genuine maintenance on a cycle. On concrete it is optional, and doing it at the wrong time or too often does measurable harm.
Concrete driveway sealcoating is a cycle, not an annual ritual
Sealcoat protects the binder from oxidation and keeps water out of the surface. It has to be applied to a cured surface, which is why a new drive is left for a season first, and reapplied on a cycle set by exposure and traffic rather than by the calendar. Applied too often it builds up, cracks in sheets and looks worse than no seal at all.
Sealing concrete driveway surfaces is optional and situational
A plain concrete drive in a mild climate may never need a sealer. In a salted freezing climate a penetrating sealer reduces chloride ingress and is a reasonable spend. On decorative or stamped concrete the sealer is doing a visual job as well and is genuinely part of owning the finish. Which of those three you are in decides whether sealing is maintenance or marketing.
Timing matters more than the product, and so does the concrete driveway sealing cost
New concrete and new asphalt both need to cure before anything is applied. Sealing too early traps moisture in concrete and softens fresh asphalt. Ask the contractor who built the drive when the first seal should be, get it in writing, and treat anyone knocking on the door offering to seal a two week old drive as the warning they are.
What a driveway coating quote should state
The product by name, whether the surface is being cleaned and how, whether cracks are being filled first, the number of coats, and the cure time before vehicles. Sealing over a dirty or wet surface is the commonest reason a seal fails early, and preparation is where a cheap price is usually taken from.
Driveway sealing against the door knock
Sealcoating is the classic trade for unsolicited door to door work with leftover material and no fixed address. The material may be thinned, the preparation skipped and the warranty worthless. It costs nothing to take a card, look up the firm, and get a written quote for a scheduled date instead of a price for right now.
Questions people ask about driveway sealing cost
How often should a driveway be sealed?
On asphalt, on a cycle set by climate, sun and traffic rather than annually, and over sealing causes its own cracking. On plain concrete, often never, unless you are in a salted freezing climate. On decorative concrete, as part of maintaining the finish. Ask the contractor who built it what they would do.
Can a new driveway be sealed straight away?
No. Both concrete and asphalt need to cure first, and sealing early is actively harmful: it traps moisture in concrete and keeps fresh asphalt soft. The wait is measured in months rather than days, and the exact number depends on your climate and the mix, so get it from the contractor in writing.
Does sealing fix cracks?
No. Crack filling is a separate operation that happens before sealing, and a sealer applied over open cracks simply covers them while water carries on reaching the base. A sealing quote that does not mention crack filling on a cracked drive is quoting the easy half of the work.
Is a concrete driveway sealer worth it on plain concrete?
It depends on chlorides. Where the drive is salted every winter, a penetrating sealer slows chloride ingress and is a reasonable spend. Where it is not, plain concrete outside is generally fine unsealed, and the money does more as joint maintenance and drainage.
How much to seal a driveway?
Sealing is cheap and quick, and the price follows what the quote includes: the product by name, whether and how the surface is cleaned, whether cracks are filled first, the number of coats and the cure time before vehicles go back on. On asphalt it is maintenance on a cycle; on plain concrete it is often unnecessary unless the drive is salted every winter.