Crack Sealing & Sealcoating in Harlingen, TX

Crack sealing and sealcoating are the maintenance steps that keep asphalt from falling apart early. Crack sealing fills cracks with a flexible material so rain cannot reach the base. Sealcoating covers the whole surface with a thin protective layer against sun, oxidation and spills. In Harlingen, both matter. The rainy months send water into every open crack, and the sun bleaches and dries out asphalt the rest of the year.

Cracks first

Clay ground moves with the seasons, and asphalt cracks as it does. Left open, a crack lets water into the base, the base softens, and the crack becomes a pothole. We clean cracks out with air, and fill them with hot-applied sealant that stays flexible as the pavement moves. Filling cracks before the late-summer rain is the most cost-effective thing you can do for a driveway or lot.

Then the sealcoat

Sealcoat goes over a clean, repaired surface. HomeGuide recommends waiting 3 to 6 months after new paving, then resealing every 2 to 10 years depending on product and climate. With strong sun most of the year, Harlingen pavement tends toward the shorter end. When the surface has turned gray and the stone is showing, it is time.

Weather windows

Sealer needs dry pavement and temperatures between about 50 and 95 degrees, per HomeGuide, and 12 to 72 hours before cars drive on it. In Harlingen that usually means mornings in summer, and keeping an eye on the forecast through September and October when Gulf storms build quickly.

Preparation

• Blowing, sweeping and edging the surface
• Priming oil and fuel spots so sealer bonds
• Crack sealing and any small patching
• Hand-cutting edges along slabs, curbs and walks
• Barricading until the sealer cures

Product choice

Sealers come in two main families. Refined coal tar holds up well against gasoline and oil, but HomeGuide points out that many jurisdictions have banned it on health and environmental grounds. Asphalt-based emulsions are the greener choice, with the trade-off that fuel and oil spills mark them more easily. We tell you which product we plan to use before starting.

What sealing cannot do

Sealcoat does not hold together pavement that has already failed. If there are potholes, ruts or widespread alligator cracking, those are repaired first, and sometimes the right answer is an overlay rather than a seal job.

Commercial maintenance schedules

For property managers with several lots, we can set up a rotation: crack sealing each spring, sealcoat on a multi-year cycle, and restriping after each seal, so no lot goes too long without attention.