Asphalt Sealcoating Calculator
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Sealcoat is sold by the gallon, not the ton. Coverage runs roughly 60–65 square feet per gallon per coat — and two coats are always recommended. Enter your driveway area to get your gallon count and cost estimate.
Sealcoat Estimate
Material only. Contractor-installed sealcoating typically runs $0.15–$0.35/sq ft for labor + product.
What sealcoating actually does — and doesn't do
What sealcoating does
- Slows oxidation: asphalt binder degrades when exposed to UV light and oxygen, making the surface brittle and gray. Sealcoat blocks UV penetration and significantly slows this process.
- Reduces water infiltration: water is asphalt's main structural enemy — it enters cracks, freezes, and expands, widening damage. Sealcoat closes surface pores and slows water entry into the asphalt matrix.
- Restores appearance: a freshly sealed driveway looks close to newly paved, which many homeowners value and which helps curb appeal.
- Improves fuel and chemical resistance: gasoline, oil, and road salts degrade asphalt binder; sealcoat provides a barrier against surface-level spills.
What sealcoating does not do
- Fix structural cracks or rutting: sealcoat is a coating, not a repair. Applying it over alligator cracking or base-related rutting seals the problem out of sight but doesn't address the underlying failure.
- Restore significant surface damage: deep pitting, edge cracking, or extensive surface deterioration requires crack filling or patching before sealcoating, not instead of it.
- Last forever: residential sealcoating typically lasts 2–5 years depending on traffic, climate, and product quality before it needs reapplication.
When to sealcoat — and when to wait
New asphalt should not be sealed immediately. Fresh hot-mix asphalt contains volatile compounds that need to cure and off-gas for at least 6–12 months after installation before a sealer can bond properly. Sealing too soon traps these compounds and can prevent the asphalt from reaching its final hardened state.
The ideal time to first seal a driveway is 12–18 months after initial paving. After that, reseal every 2–5 years depending on traffic and climate. In hotter climates with intense UV, every 2–3 years is common. In moderate climates with less UV exposure, every 4–5 years is often sufficient.
Wait for the right weather: sealcoat needs temperatures above 50°F (ideally above 60°F) and no rain for at least 24–48 hours after application to cure properly. Most contractors recommend sealing in late spring or early fall — avoiding peak summer heat, which can cause the sealer to dry too quickly and streak.
Sealcoat coverage by driveway size
Based on 65 sq ft/gallon per coat (typical for a smooth residential driveway) and two coats. Rough or highly textured surfaces need more product.
| Driveway | Area | Gallons (2 coats) | Est. material cost |
|---|---|---|---|
| Small single car | 200 ft² | ≈ 6 gal | ~$30–$60 |
| Standard single | 288 ft² | ≈ 9 gal | ~$45–$90 |
| Double car | 400 ft² | ≈ 12 gal | ~$60–$120 |
| Long single | 480 ft² | ≈ 15 gal | ~$75–$150 |
| Long double | 800 ft² | ≈ 25 gal | ~$125–$250 |
| Large estate / commercial | 2,000 ft² | ≈ 62 gal | ~$310–$620 |
Material cost at $5–$10 per gallon for a quality driveway sealer. Contractor-applied sealcoating on a typical residential driveway usually runs $0.15–$0.35 per square foot (installed), including product and labor.
Need to estimate the asphalt itself for a new driveway? Use the driveway calculator for tonnage and material cost.
Frequently asked questions
Roughly 1 gallon covers 60–65 square feet per coat on a typical smooth residential driveway surface. Two coats are recommended, so plan on approximately 1 gallon per 30–32 square feet total (for both coats combined). Rough or weathered surfaces absorb more product and need slightly higher coverage.