How to Fix a Cracked Driveway: Asphalt and Concrete Repair (2026)

Frequently Asked Questions

What is the best filler for driveway cracks?

For asphalt: liquid rubberized asphalt crack filler (pourable, self-leveling) for cracks up to 1/2 inch. Asphalt cold patch for deeper holes. For concrete: polyurethane or epoxy crack filler (Quikrete Polyurethane Concrete Crack Sealant) for cracks up to 1/2 inch; hydraulic cement for cracks with active water infiltration; vinyl concrete patcher for chipped edges and wide cracks over 1/2 inch. Avoid standard latex caulk — it doesn't bond well to either surface.

How do I know if my driveway crack is structural?

Signs of structural problems: (1) Both sides of the crack are at different heights (heave or settlement) — the slab is moving, not just cracking. (2) Alligator or map cracking (a network of interconnected cracks in a small area) — indicates base failure underneath. (3) Crack getting wider season to season. (4) Soft or spongy feel when you walk over the cracked area. Structural cracks need a contractor assessment — filler won't fix the underlying movement.

Should I seal coat my asphalt driveway after crack repair?

Yes, 30–90 days after crack repair on new asphalt. On mature asphalt (5+ years), seal coat after crack repair is a good maintenance step. Seal coat fills small pores, protects from UV degradation and freeze-thaw damage, and makes cracks less visible. Apply when temperatures are consistently above 50°F. Do not seal coat more than once every 2–3 years — over-sealing creates a slippery buildup layer.

How long does driveway crack filler last?

Asphalt rubberized crack filler: 2–5 years with seal coat on top. Exposed (no seal coat): 1–3 years. Concrete polyurethane crack filler: 5–10 years. Concrete epoxy injection: 10–20 years. The repair lasts as long as the driveway doesn't continue to move. If the underlying cause (tree roots, poor drainage, base erosion) isn't fixed, cracks reopen.

What causes driveway cracks?

Concrete: shrinkage cracks (normal, appear in first year), freeze-thaw cycling (water enters cracks, freezes, expands), tree roots pushing up slabs, de-icing salt damage (spalls the surface), and settlement from unstable subbase. Asphalt: oxidation from UV (surface becomes brittle), water penetration under the surface, heavy vehicle loads beyond design, tree root intrusion, and base failure from poor drainage.

Cracks under 1/4 inch wide in asphalt or concrete can be filled with crack filler and sealed to prevent water penetration. Wider cracks (1/4 to 1 inch) need backer rod or patching material before filler.

Driveway cracks are normal over time — here’s how to stop them from becoming bigger problems.

Step 1: Assess what you have

Crack type	Width	Likely cause	Fix
Hairline	Under 1/8”	Shrinkage (concrete) or oxidation (asphalt)	Sealant or sealer only
Standard crack	1/8” – 1/2”	Freeze-thaw, roots	Crack filler
Wide crack	1/2” – 1”	Settlement, roots	Backer rod + patch material
Heaved/settled crack	Any width, edges at different heights	Base failure	Contractor assessment
Alligator cracking	Network of cracks	Base failure	Full section replacement

Before filling any crack: check if the edges are level by running your foot across. A height difference of more than 1/2 inch indicates the slab has moved — fill it, but understand this isn’t a permanent fix.

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Asphalt driveway crack repair

Small cracks (under 1/2 inch)

1. Clean the crack. Use a stiff brush and shop vac to remove all dirt, loose asphalt, and vegetation. Weeds will push through filler — spray the crack with vegetation killer and let dry 24–48 hours.

2. Apply crack filler. Pour rubberized asphalt crack filler directly into the crack. It’s self-leveling — fill to just below the surface. Don’t overfill.

3. Level the fill. Press down with a putty knife or drag a flat board across to level.

4. Cure time. 24–48 hours before traffic. Filler stays slightly flexible when fully cured.

5. Seal within 90 days. Apply asphalt sealer over the entire driveway to protect the repair and the surrounding surface.

Deeper or wider cracks (1/2 to 1 inch)

1. Use backer rod. For deep cracks, insert foam backer rod into the crack to within 1/4 inch of the surface. This saves filler and prevents it from sinking into a void.

2. Fill with cold patch material. For cracks close to 1 inch, asphalt cold patch material fills the gap better than liquid filler. Tamp firmly.

3. Level and seal as above.

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Concrete driveway crack repair

Hairline and small cracks (under 1/4 inch)

Apply concrete crack sealant directly. Clean the crack first with a wire brush and blow out dust with compressed air. Cut the nozzle at a 45-degree angle, fill the crack slowly, and tool smooth with a putty knife.

Standard cracks (1/4 to 1/2 inch)

1. Clean with wire brush and compressed air.
2. For cracks over 1/4 inch: use vinyl concrete patcher or two-part epoxy concrete filler.
3. Mix according to instructions. Press into the crack with a putty knife.
4. Feather the edges flush with the surrounding surface.
5. Let cure 24 hours before traffic.

Spalled or chipped concrete

Spalling (where the surface layer peels off, leaving a rough pitted area) is a different problem than cracks — it’s a surface-depth repair.

1. Chip out all loose material with a cold chisel.
2. Clean with wire brush.
3. Moisten the repair area (wet concrete bonds better).
4. Apply concrete resurfacer mixed to a thick paste.
5. Press in and feather edges.

For large spalled areas (more than a few square feet), a full resurfacer coat over the entire slab section looks better than patch spots.

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Preventing future cracks

For both materials:

• Fill cracks as soon as they appear — water entering cracks accelerates damage dramatically through freeze-thaw cycles
• Clear standing water from drainage issues near the driveway

Concrete-specific:

• Never use rock salt or sodium chloride de-icers — they destroy concrete surfaces. Use sand or calcium magnesium acetate.
• Seal concrete every 3–5 years

Asphalt-specific:

• Seal coat every 2–3 years to protect from UV degradation
• Trim tree roots that are approaching the driveway

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Related guides

• How to Seal a Driveway — seal coating after crack repair
• Concrete Driveway Cost — when repair turns into replacement
• Asphalt Driveway Cost — full resurfacing and replacement pricing
• Stump Grinding Cost — remove tree stumps that cause root damage
• How to Power Wash Your House — clean before sealing