The Importance of Asphalt Crack Sealer: Extending the Life of Pavements

Maintaining the integrity of asphalt pavements is crucial for ensuring their longevity and functionality. One of the most effective methods for preserving asphalt surfaces is the use of asphalt crack sealer. This article delves into the significance of asphalt crack sealing, its benefits, application methods, and best practices for achieving optimal results.

Understanding Asphalt Cracks

Asphalt pavements, whether they are roads, parking lots, or driveways, are subjected to various stresses over time. These stresses can lead to the formation of cracks due to factors such as

Temperature Fluctuations: Expansion and contraction due to changes in temperature can cause cracks.Water Infiltration:  Water can seep into the asphalt, weakening its structure and leading to cracks.
Traffic Load:  Continuous traffic, especially heavy vehicles, can stress the asphalt, causing it to crack.
Aging and Oxidation:  Over time, asphalt loses its flexibility and becomes brittle, making it more susceptible to cracking.

What is Asphalt Crack Sealer?

Asphalt crack sealer is a specialized material used to fill and seal cracks in asphalt pavements. It is designed to prevent water, debris, and other elements from penetrating the pavement, thereby mitigating further damage and prolonging the pavement’s life. Crack sealers are typically made of rubberized asphalt or other elastomeric materials that remain flexible over time, allowing them to expand and contract with the pavement.

 Benefits of Using Asphalt Crack Sealer

 1. Extends Pavement Life

By sealing cracks promptly, asphalt crack sealer prevents water from entering the pavement layers. Water infiltration can cause significant damage, including potholes and base layer weakening. Sealing cracks helps maintain the pavement’s structural integrity, extending its lifespan.

2. Cost-Effective Maintenance

Crack sealing is a relatively inexpensive maintenance procedure compared to other pavement rehabilitation methods, such as overlay or reconstruction. Regular crack sealing can significantly reduce the need for more extensive and costly repairs.

3. Improves Aesthetics

Sealed cracks give the pavement a smooth, uniform appearance, enhancing its overall look. This is particularly important for commercial properties, where the condition of the parking lot can influence customers’ perceptions.

 4. Enhances Safety

Open cracks can pose a hazard to pedestrians and vehicles. Sealing these cracks reduces the risk of accidents, making the pavement safer for users.

 Types of Asphalt Crack Sealers

Several types of asphalt crack sealers are available, each with its specific properties and applications:

 1. Cold-Applied Crack Sealers

Cold-applied crack sealers are ready-to-use products that do not require heating before application. They are ideal for smaller cracks and minor repairs. These sealers are easy to apply and cure quickly, making them suitable for DIY projects.

2. Hot-Applied Crack Sealers

Hot-applied crack sealers are heated to a specific temperature before application. They provide a more durable and long-lasting seal compared to cold-applied sealers. Hot-applied sealers are commonly used for larger cracks and in commercial or high-traffic areas.

 3. Polymeric Sealers

Polymeric crack sealers are formulated with polymers to enhance their flexibility and durability. They are ideal for areas with extreme temperature fluctuations, as they can expand and contract without losing their sealing properties.

 Application Methods

The success of asphalt crack sealing depends on proper application. Here are the essential steps involved:

 1. Crack Preparation

Before applying the sealer, it is crucial to clean the cracks thoroughly. Remove any debris, dirt, vegetation, and loose asphalt using a wire brush, compressed air, or a vacuum. For larger cracks, routing may be necessary to create a uniform shape that allows the sealer to adhere better.

 2. Choosing the Right Sealer

Select the appropriate type of sealer based on the crack size, pavement condition, and expected traffic load. Ensure that the sealer is compatible with the existing pavement material.

3. Sealing the Cracks

For cold-applied sealers, apply the product directly from the container using a pour pot, squeegee, or caulking gun. For hot-applied sealers, use specialized equipment to heat the sealer to the recommended temperature and apply it evenly into the cracks. Ensure that the sealer fills the crack completely, slightly overfilling it to account for settling.

4. Curing and Finishing

Allow the sealer to cure according to the manufacturer’s instructions. This may take several hours to a few days, depending on the type of sealer and weather conditions. Once cured, inspect the sealed cracks to ensure proper adhesion and fill. If necessary, apply a second layer of sealer.

Best Practices for Asphalt Crack Sealing

To achieve the best results, consider the following best practices:

1. Timing is Crucial

Perform crack sealing during moderate weather conditions, ideally when the temperature is between 50°F and 80°F. Avoid sealing during extreme heat, cold, or wet weather, as these conditions can affect the sealer’s performance.

 2. Regular Maintenance

Incorporate crack sealing into your regular pavement maintenance schedule. Inspect the pavement periodically for new cracks and seal them promptly to prevent further deterioration.

3. Quality Materials

Use high-quality crack sealers that meet industry standards. Investing in superior materials ensures a longer-lasting and more effective seal.

 4. Professional Application

For larger projects or heavily trafficked areas, consider hiring professional contractors with experience in asphalt crack sealing. They have the expertise and equipment to ensure the job is done correctly and efficiently.


Asphalt crack sealer plays a vital role in maintaining and preserving asphalt pavements. By addressing cracks promptly and effectively, property owners can extend the life of their pavements, enhance safety, and reduce maintenance costs. Whether for residential driveways or commercial parking lots, regular crack sealing is an essential practice for keeping asphalt surfaces in optimal condition. Embracing best practices and using high-quality materials will ensure the longevity and durability of the pavement, providing a smooth and safe surface for years to come.

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