Asphalt is one of the most durable and cost-effective paving materials available, which is why it’s widely used for residential driveways and commercial parking lots. However, even asphalt is vulnerable to wear and tear over time. Sun exposure, water intrusion, oil spills, and changing temperatures all take a toll. That’s where asphalt sealcoating comes in. With this in mind, we at Andersen Asphalt & Striping would like to discuss what asphalt sealcoating is and how it works.
What is Asphalt Sealcoating?
Asphalt sealcoating is a protective coating applied to the surface of asphalt pavement. It acts as a barrier against damaging elements such as UV rays, rain, snow, chemicals, and vehicle fluids. Think of it as sunscreen for your driveway or parking lot, it doesn’t replace the asphalt, but it protects it from premature deterioration.
Sealcoating is typically made from either coal tar or asphalt emulsion mixed with water, sand, and additives. Once applied, it restores the rich black appearance of asphalt while adding a layer of protection that helps extend the pavement’s lifespan.
Why Asphalt Needs Protection
Asphalt contains oils and binders that give it flexibility and strength. Over time, exposure to oxygen and ultraviolet (UV) rays causes oxidation. This process dries out the surface, making it brittle and prone to cracking. Water can then seep into these cracks, weakening the base and leading to potholes and structural damage.
Vehicle fluids like gasoline and oil also break down asphalt binders. In high-traffic areas, constant pressure and turning tires further wear down the surface. Without protection, asphalt can deteriorate much faster than expected, resulting in costly repairs or full replacement.
How Does Sealcoating Work?
The sealcoating process involves several important steps to ensure proper adhesion and performance:
1) Cleaning the Surface. Before sealcoating, the pavement must be thoroughly cleaned. Dirt, debris, oil stains, and vegetation are removed using blowers, power washers, and cleaning agents. This step ensures the sealant bonds properly to the surface.
2) Repairing Cracks & Damage. Cracks are filled and minor potholes are patched before applying the sealcoat. Sealcoating is not designed to fix structural damage; instead, it protects a sound surface. Addressing minor issues first prevents them from worsening underneath the new layer.
3) Applying the Sealcoat. The sealcoat is applied using spray systems or squeegees, depending on the size and type of the project. Professionals apply an even, uniform coat across the surface. In some cases, two thin coats are applied for better durability.
4) Curing & Drying. After application, the sealcoat needs time to cure. Drying time typically ranges from 24 to 48 hours, depending on weather conditions. During this time, traffic should be kept off the surface to ensure proper bonding.
How Often Should Sealcoating Be Done?
Most residential driveways benefit from sealcoating every 2–3 years. Commercial parking lots with heavier traffic may require more frequent maintenance. Climate, traffic volume, and overall pavement condition all play a role in determining the ideal schedule.
The Long-Term Benefits
Regular sealcoating can significantly extend the life of asphalt pavement. It reduces oxidation, prevents water penetration, resists chemical damage, and improves curb appeal. By investing in routine sealcoating, property owners can avoid expensive repairs and keep their asphalt looking clean, smooth, and professional for years to come.
Asphalt Parking Lot & Road Pavement Resurfacing, Replacement & More in Reno, Elko, Henderson, North LV, Paradise, Spring Valley, Sunrise Manor, Las Vegas, NV | State of Nevada
In a nutshell, asphalt sealcoating is a proactive maintenance solution that protects your investment and preserves the strength and appearance of your pavement. Reach out to Andersen Asphalt & Striping for top-quality asphalt sealcoating services!
