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Types of Asphalt Crack Fillers
Choosing the right crack filler depends on crack width, your budget, and whether you're doing it yourself or hiring a pro:
| Type | Best For | Coverage/Gal | Cost | Lifespan |
|---|---|---|---|---|
| Cold-pour liquid | ¼"–½" cracks (DIY) | 50–75 lin ft | $10–$20/gal | 1–2 years |
| Hot-pour rubberized | ¼"–1" cracks (Pro) | 30–50 lin ft | $15–$30/gal | 3–5 years |
| Caulk-tube | Small spot repairs | 10–20 lin ft/tube | $5–$8/tube | 1–2 years |
| Backer rod + sealant | ½"–1½" wide cracks | Varies | $0.15/ft rod + sealant | 3–5 years |
After filling cracks, protect your surface with sealcoating to prevent future damage. For larger damage areas, use our Cold Mix Asphalt Calculator to estimate patching material.
How to Fill Asphalt Cracks (Step-by-Step)
- Clean cracks: Remove weeds, dirt, and loose material. Use a screwdriver, wire brush, or compressed air. For best adhesion, use a heat lance or hot air blower (pros).
- Route cracks (optional): For professional results, use a crack router to create a uniform ¾"W × ¾"D reservoir. This increases sealant contact area by 300%.
- Insert backer rod: For cracks wider than ½", push foam backer rod to within ¼" of the surface. This saves sealant and creates proper depth-to-width ratio.
- Apply filler: Pour or inject sealant to slightly below the surface (⅛" recess). Overfilling causes bumps and tracking.
- Smooth and blend: Use a squeegee, V-shaped pour pot, or trowel to smooth the filler flush with the surrounding pavement.
- Cure time: Cold-pour: 24–48 hours. Hot-pour: ready in 15–30 minutes. Don't drive on wet filler.
When to call a pro: If you have more than 200 linear feet of cracks, alligator cracking, or cracks wider than 1.5", it's more cost-effective to hire a contractor. Get a full estimate with our Asphalt Repair Cost Calculator.
Crack Filling Cost: DIY vs Professional
| Scenario | Crack Length | DIY Cost | Pro Cost | DIY Savings |
|---|---|---|---|---|
| Small driveway (few cracks) | 25 ft | $8–$15 | $75–$150 | 85–90% |
| Moderate driveway | 100 ft | $30–$60 | $150–$300 | 75–80% |
| Small parking lot | 500 ft | $100–$250 | $500–$1,500 | 70–80% |
| Large lot / road | 2,000 ft | $400–$1,000 | $2,000–$6,000 | 75–85% |
Crack Fill Calculator FAQ
How much crack filler do I need for a driveway?
For a typical 600 sq ft driveway with moderate cracking, you need 2–4 gallons of pourable crack filler. One gallon covers 50–75 linear feet of cracks that are ¼" wide and ½" deep.
How much does asphalt crack sealing cost?
DIY: $0.50–$1.50/linear foot. Professional: $1.00–$3.00/linear foot. For 100 ft of cracks — DIY costs $50–$150 vs pro at $100–$300.
What is the best asphalt crack filler?
Hot-pour rubberized sealant is the professional standard (3–5 year life). For DIY, cold-pour options work for cracks under ½". For cracks wider than 1", use backer rod + hot-pour.
When should you fill asphalt cracks?
Fill cracks at ¼"–1" width before they spread. Best temperature: 50–80°F. Spring and autumn are ideal. Don't apply when rain is expected within 24 hours.