What is the primary function of surface sealers on asphalt?

The primary function of surface sealers on asphalt is to protect the pavement from weather elements. These sealers serve as a barrier against harmful factors such as ultraviolet (UV) rays from the sun, moisture, oil spills, and chemicals that can degrade the asphalt over time. By sealing the surface, these products help to prevent water infiltration, which can lead to cracks and potholes as the water freezes and thaws within the asphalt structure. Additionally, surface sealers can reduce oxidation, thereby prolonging the lifespan of the asphalt pavement. Their role in protecting the surface ensures that the pavement remains durable and requires less frequent maintenance, ultimately saving time and costs associated with repairs.