Parking Lot Sealcoating Long Island

Sealcoating applies a thin protective layer over existing asphalt, sealing surface pores against water, UV rays, oil, and road salt. It slows oxidation, keeps the pavement flexible longer, and gives the lot a clean, jet-black appearance that tells tenants and customers the property is maintained.

What it doesn’t do: fix structural problems. Sealcoating won’t hold together cracked or crumbling pavement — it goes over sound asphalt. If your lot has significant cracking, that gets addressed first with asphalt repair or pothole repair. Sealcoating is the final step, not the first one.

You may have noticed that some contractors offer a cheaper price and a blacker-looking finish. In most cases, that’s coal tar sealer — and in New York State, it’s now illegal.

New York banned coal tar pavement products effective November 2023 (ECL §37-0115). The reason: coal tar sealer contains PAHs — polycyclic aromatic hydrocarbons — at concentrations far higher than asphalt-based products. PAHs are classified human carcinogens that wash into stormwater and accumulate in soil.

PaveMaster uses asphalt-emulsion sealer — the legally compliant, commercially proven product. If a contractor is quoting coal tar in New York today, they’re quoting an illegal product.

Sealcoating over open cracks is a mistake. Water will find them, and freeze-thaw cycles will make them worse regardless of what’s on the surface.

The correct sequence: crack sealing first, then sealcoating. We fill cracks with hot-pour rubberized sealant that flexes with temperature changes rather than becoming brittle. Skipping this step is common among lower-bid contractors. It’s the reason those jobs look fine in May and start failing by October.

Fresh sealcoat is the right moment to restripe. The surface is clean, the sealer has cured, and new lines bond to a uniform surface rather than a patchwork of old markings and faded asphalt.

PaveMaster handles striping as part of the same mobilization — parking stalls, fire lanes, directional arrows, and ADA-compliant accessible markings. One crew, one visit. Property managers who split sealcoating and striping between separate contractors often end up with scheduling gaps and ADA markings that don’t meet current dimensional standards.

The typical recommendation for commercial parking lots is every 2–3 years, depending on traffic volume and sun exposure. South-facing lots and high-turnover retail properties may need it closer to every two years. Lower-traffic HOA lots with good drainage can often go three.

The tell: when the surface starts showing gray oxidation and the aggregate begins to show through, you’re at or past the right window. Waiting until the pavement looks visibly weathered means the sealer has less to bond to and you’ve already lost some pavement life.

Sealcoating requires the lot to be closed to traffic for curing — typically 24 hours, sometimes less depending on temperature and humidity. We coordinate with property managers on timing to minimize disruption. Early morning starts are standard.

The process: lot is blown clean of debris, cracks pre-treated if not already completed, sealer applied by spray or squeegee depending on lot condition, edges detailed by brush, lot coned off until cure is complete. Line striping follows once the sealer is fully cured, either same day or next morning depending on conditions.