Effective asphalt maintenance is essential for preserving the integrity and appearance of your property’s driveways, parking lots, and pathways. Yes, for property owners, maintaining asphalt pavements can feel like a never-ending task.
Without regular upkeep, however, asphalt surfaces can deteriorate rapidly, leading to costly repairs and potential safety hazards. While there are many ways to maintain an asphalt surface, two of the most common methods are crack sealing and slurry sealing.
Both crack sealing and slurry sealing can address pavement cracks but have different characteristics and benefits. This post will guide you through the differences between crack sealing and slurry sealing, helping you make informed decisions for your property.
Parking lot crack sealing involves filling cracks that have already formed on the asphalt surface. Over time, factors like weather, traffic, and natural wear and tear cause asphalt to crack. These cracks act as entry points for water, which can seep into the asphalt and the underlying base layers, leading to further damage if left unaddressed.
There are two types of crack sealing products that are commonly used: hot-pour and cold-pour.
Hot-pour sealants are heated before application, allowing them to flow smoothly into the cracks and form a durable bond. Hot-pour is made up of rubber-modified asphalt and has abrasive properties, enhancing the bonding effects. Cold-pour sealants, on the other hand, are applied at ambient temperature and are ideal for smaller cracks. Cold-pour crack sealant contains silicone-based materials.
Regularly sealing cracks is an investment in your property because it can significantly extend the lifespan of your asphalt pavement. Acting as a water barrier, it can prevent small cracks from widening and creating severe damage such as potholes. Not only does this reduce the need for costly repairs, but crack sealing also provides a more secure and safe property. Crack sealing improves the stability and structure of your asphalt and reduces liability risks.
Slurry sealing takes a broader approach to asphalt maintenance. It involves applying a thin layer of asphalt emulsion, crushed rock (aggregate), and additives to the entire surface. This mixture forms a protective coating that not only fills minor cracks but also serves several other important functions. The additives provide durability, resilience, and strain resistance as the material bonds to the asphalt surface.
Slurry sealing protects the asphalt surface against regular wear and tear and damaging environmental factors. The emulsion acts as a barrier against water infiltration, UV rays, and oxidation. This prevents the asphalt from deteriorating due to exposure to the elements, extending its lifespan.
As a bonus, it creates a fresh wearing surface that improves skid resistance and overall texture. This enhances the safety of the pavement, especially in wet conditions, and provides an extra layer of protection for the foundation. In addition, slurry sealing gives the asphalt a renewed, dark appearance, improving the curb appeal of your property. A well-maintained surface can leave a positive impression on tenants, customers, and visitors.
Before it is applied, existing cracks and asphalt damage should be thoroughly repaired. In its liquid form, slurry sealant is applied using hand equipment and specialized vehicles or applicators to protect the asphalt surface and edges.
Slurry seal quickly dries within several hours, reducing traffic disruptions.
| Characteristic | Crack Seal | Slurry Seal |
| Purpose | Prevents moisture from seeping into the base and causing further damage | Seals small cracks and imperfections resulting in an appealing aesthetic surface |
| Material | Water, additives, coal tar, and/or emulsifying agents | Water, asphalt emulsion, aggregate, and additives |
| Application | Sealant placed directly inside cracks | Applied as a thin layer |
| Benefits | Prevents contaminants from entering waterways, extends asphalt longevity, and restores durability
| Improves surface appearance and skid resistance, resists water penetration, restores lost flexibility, and protects against harsh Ontario summer and winter weather |
| Ideal For | Cracks wider than ⅛ of an inch: longitudinal, block, thermal, edge, reflective, or transverse cracking | Pavement surfaces in fair to good condition |
| Lifespan | 5 to 10 years | 7 to 8 years |
| Cost | $0.65 to $1.25 per linear foot | $0.60 to $0.96 per square foot |
When deciding between crack sealing and slurry sealing, it’s essential to assess the condition of your asphalt and your maintenance goals. If your asphalt has developed visible cracks, crack sealing is the way to go. It addresses specific problem areas, preventing water infiltration and further damage.
Slurry sealing, on the other hand, is often applied to surfaces that are in good condition. It can be used as a protective layer to prevent cracks and indentations from forming. It can be applied to areas with existing cracks after the cracks have been repaired.
While crack sealing and slurry sealing offer long-lasting benefits for your asphalt surfaces, to make the best decision, consider seeking a professional evaluation of your asphalt. Experts can assess the condition of your pavement, identify the most suitable treatment, and ensure the work is done correctly.
In addition, the local climate and present weather conditions will also determine the type of sealant best suited for your property. Consider the amount of traffic your property gets and the type of traffic (heavy vehicles, etc.) to find out if crack sealant or slurry sealant is right for you.
Crack sealing and slurry sealing are two effective techniques that serve different purposes in asphalt maintenance. By understanding the differences between these methods, property managers can make informed decisions to keep their asphalt pavement in top condition.
For expert advice and professional crack sealing and slurry sealing services in Toronto and the GTA, talk to the team at Sure-Seal Pavement Maintenance Inc. We offer a two-year warranty on our crack sealing services and a three-year warranty on our slurry sealing services.
To ensure you receive the best service, our team provides free inspections and detailed assessments. Maintaining your asphalt has never been easier or more effective! Contact us today to learn more about our crack sealing and slurry sealing processes.
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