Seal coating is essential in extending the life of your asphalt pavement. Think of seal coating more as preventative maintenance for your parking lot or road, similar to how you paint your house to keep the weather from deteriorating the wood.
Seal coating seals small cracks and will prevent water from penetrating the asphalt surface into the subgrade material. Another benefit of seal coating is that it helps protect the asphalt from the sun as well as the harmful effects of chemical spills such as oil and gasoline. It also fills surface voids, which will reduce exposure to oxygen, UV rays and reduces the depth to which oil or gas can penetrate the asphalt.