Every asphalt driveway cracks eventually. The good news: most cracks are easy to deal with if you catch them early. Left alone through a Pennsylvania winter, though, a small crack can turn into a pothole by spring.
Why asphalt cracks
Asphalt is flexible, but it dries out over time from sun exposure. As it gets brittle, temperature swings and the weight of vehicles cause it to split. Water then gets into the crack, freezes, and widens it. That cycle is what turns hairline cracks into real damage.
Common types of cracks
- Hairline cracks — thin surface cracks, usually handled by sealcoating
- Linear cracks — longer straight cracks, ideal for crack filling
- Edge cracks — along the sides of the driveway, often from weak support underneath
- Alligator cracking — a web of connected cracks that looks like reptile skin; usually a sign the base is failing
How crack filling works
Proper crack repair starts with cleaning the crack out — removing dirt, weeds and loose material so the filler can bond. Then a flexible crack filler is applied to seal the opening and keep water out. Once filled, the driveway can be sealcoated for an even finish and extra protection.
Filling cracks before sealcoating is important. Sealer alone doesn't bridge open cracks; it just coats over them.
When cracks need more than filler
Wide alligator cracking, sunken areas and potholes usually mean the ground underneath has weakened. Those spots typically need patching, and in severe cases a section may need to be replaced. We'll tell you honestly if your driveway is past the point where filling and sealing will help.
Not sure what your cracks need?
Try our Free Driveway Check — upload a few photos and describe what you're seeing, and you'll get a preliminary recommendation. For a firm answer, we'll come out and look in person.
Common questions
Should cracks be filled before sealcoating?
Yes. Cracks should be cleaned and filled first. Sealcoating protects the surface but won't seal open cracks on its own.
Can alligator cracking be repaired?
Light alligator cracking can sometimes be patched. Widespread alligator cracking usually means the base has failed and that section needs more extensive repair.