Blacktop sealer cost: per gallon, per sq ft & job totals

Blacktop sealer cost is the price to sealcoat a blacktop (asphalt) driveway — either DIY gallons or a pro job priced per square foot with a minimum. AsphaltTons.com does not sealcoat or bid. Broader maintenance: asphalt sealcoating; pro bands: asphalt driveway sealcoating cost; gallons: driveway sealer calculator.

Sealer gallons calculator → Sealcoating cost guide →

Blacktop sealer cost per gallon (DIY)

Home-center blacktop/asphalt sealer is sold by the five-gallon pail (and sometimes smaller). Divide the shelf price by coverage on the label (sq ft per gallon or per pail) for a DIY material $/sq ft. Two thin coats double material need. Tools, crack filler, and cleaners add to the project total.

Blacktop sealer cost per square foot (pro)

Contractors often quote a per-square-foot rate that bundles cleaning, application, and labor — with a job minimum that can dominate short driveways. Oil-spot priming, heavy cleaning, or crack work may be extras. Use sealcoating cost for planning bands; verify locally.

Job totals: worked sketch

Example: a 20×40 ft drive is 800 sq ft. If a label claims roughly 300–400 sq ft per five-gallon pail for a coat (varies wildly by product — read yours), you might plan on the order of a few pails for two coats plus waste. Pros bidding the same 800 sq ft will often still apply a minimum. Size gallons with the sealer calculator.

What inflates blacktop sealer cost

Failed pavement that should be patched first, heavy oil, steep grades, and “paint over alligator cracks” requests. Fill cracks first (asphalt crack filler). If the drive needs overlay or replacement, sealer is the wrong spend (resurface, replace cost).

Bottom line on blacktop sealer cost

DIY = gallons × price + tools; pro = $/sq ft with minimums. Repair first, coat thin, and use calculators for area. AsphaltTons is planning only — get local quotes for hired sealcoating.