Crack Sealing vs. Crack Filling: What’s the Difference and Why It Matters
Asphalt surfaces inevitably develop cracks over time due to weather, traffic, and aging. If left untreated, these cracks can lead to major pavement damage and costly repairs. The two primary methods to address asphalt cracks are crack sealing and crack filling—but they are not the same. Understanding the differences between these methods can help property owners choose the best solution for long-term pavement health.
What is Crack Sealing?
Crack sealing is a preventative maintenance technique that involves applying a specialized rubberized sealant into cracks to prevent water and debris infiltration. This method is best for cracks that are still active—meaning they expand and contract with temperature changes.
Benefits of Crack Sealing:
- Prevents moisture infiltration – Water is one of the biggest threats to asphalt, leading to potholes and base deterioration.
- Long-lasting solution – Crack sealing is flexible and can withstand temperature fluctuations.
- Extends pavement life – Helps delay major repairs by keeping asphalt intact.
Best Applications for Crack Sealing:
- Long, working cracks wider than 1/8 inch
- Pavement with ongoing movement due to freeze-thaw cycles
- Commercial parking lots, roadways, and high-traffic areas
What is Crack Filling?
Crack filling is a temporary repair method that involves filling cracks with an asphalt-based mixture to reduce water penetration and prevent further deterioration. Unlike crack sealing, the material used in crack filling is not flexible and does not expand and contract with pavement movement.
Benefits of Crack Filling:
- Cost-effective short-term solution – Less expensive than crack sealing.
- Quick application process – Ideal for minor surface-level cracks.
- Improves pavement appearance – Helps smooth out small cracks to enhance curb appeal.
Best Applications for Crack Filling:
- Non-working cracks that are less than 1/8 inch wide
- Driveways and low-traffic asphalt surfaces
- Areas with minimal freeze-thaw movement
Crack Sealing vs. Crack Filling: Which One Should You Choose?
The choice between crack sealing and crack filling depends on:
- Severity of Cracks – If the cracks are deep, wide, or active, crack sealing is the best option.
- Budget – Crack filling is more affordable but may not last as long.
- Long-Term Goals – If you want a solution that prevents future damage and extends pavement life, crack sealing is worth the investment.
| Feature | Crack Sealing | Crack Filling |
|---|---|---|
| Flexibility | Expands & contracts with temperature | Rigid, does not expand |
| Longevity | 3-7 years | 1-3 years |
| Cost | Higher upfront, saves money long-term | Lower cost, but needs reapplication sooner |
| Best For | High-traffic areas, large cracks | Small surface cracks, low-traffic areas |
Conclusion
Both crack sealing and crack filling are essential for asphalt maintenance, but they serve different purposes. Crack sealing is the superior long-term solution for preventing water damage and extending pavement life, while crack filling is a budget-friendly fix for minor cracks.
