Asphalt oxidation is a natural process that occurs when asphalt is exposed to oxygen, causing the asphalt to break down and become brittle. Sealing helps to prevent asphalt oxidation from occurring by creating a protective barrier between the asphalt and the elements. Here’s how sealing helps:
- Prevents Water Penetration: Water can accelerate oxidation by seeping into the asphalt and weakening its structure. Sealants help to prevent water penetration and causing further damage.
- Blocking UV Rays: Asphalt is made up of a mixture of aggregates and a binder. Exposure to sunlight and UV rays breaks down the binder causing it to dry out and lose its flexibility. A sealant helps to protect the asphalt from UV rays and prevents this damage from occurring.
- Protects Driveway from Chemicals: Gas, oil, and other chemicals can also contribute to the oxidation and degradation of asphalt. A sealant helps to provide a barrier that resists these substances which in turn protects the driveway.