Asphalt surfaces are built to endure the elements, but constant exposure to the sun’s ultraviolet (UV) rays can take a serious toll over time. Whether it is a residential driveway, a commercial parking lot, or a public roadway, UV radiation is one of the leading causes of asphalt deterioration. Andersen Asphalt & Striping would like to explore how UV exposure damages asphalt and how sealcoating acts as a powerful defense to preserve and protect your investment.
The Science of UV Damage on Asphalt
Asphalt contains a binder called bitumen, which holds together the aggregates which is a combination of rock, sand, and gravel. This gives the pavement its black, flexible, and cohesive structure. Over time, exposure to UV rays from the sun begins to oxidize the bitumen. Here is what happens when the UV rays constantly hit the asphalt:
• Oxidation dries out the asphalt, making it brittle.
• The once-flexible surface becomes prone to cracking.
• As the binder breaks down, the aggregates loosen, causing raveling.
• The deep black color fades to an unsightly gray, indicating surface wear and UV damage.
In areas with year-round sunshine or intense summers, this process happens faster and more severely.
Signs of UV-Damaged Asphalt
• Faded color that goes from black to light gray.
• Hairline cracks forming across the surface.
• Surface raveling, where the asphalt texture feels loose or gritty.
• Increased water absorption, which leads to deeper damage.
Once the surface is compromised, moisture can easily seep in, leading to freeze-thaw cycles, potholes, and expensive repairs.
How Sealcoating Protects Asphalt from UV Damage
Sealcoating is a cost-effective and proactive solution that helps combat the effects of UV exposure. Sealcoating acts like a sunscreen for your asphalt. It forms a protective barrier over the surface, shielding it from the sun’s rays and will greatly slowing down the oxidation process. By reducing UV exposure, sealcoating maintains the asphalt’s natural oils and flexibility. This helps prevent brittleness and reduces the chance of cracking. Sealcoating rejuvenates the look of your pavement by restoring that rich, jet-black color, making it look brand new and increasing curb appeal. In addition to blocking UV rays, sealcoating protects against moisture, gas, oil spills, and deicing salts, all of which further degrade asphalt surfaces.
How Often Should You Sealcoat
• New asphalt should be sealed about 6 to 12 months after installation.
• Reapply sealcoating every 2 to 3 years, depending on climate and traffic conditions.
• High-traffic areas or sun-heavy regions may need more frequent treatments.
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
UV damage is gradual but relentless. By the time cracks and raveling appear, it is often too late for simple maintenance. Sealcoating is your first line of defense that can help extend the life of your asphalt and keep it looking great year after year. Do not wait until UV rays causes serious damages to your asphalt. Contact Andersen Asphalt & Striping today to schedule your sealcoating service and give your pavement the protection it needs.
