The most important reason to seal-coat asphalt is to extend its life. If it is not properly sealed and coated, the effects of the sun, water, wind and other factors will have deteriorating effect on the asphalt over a period of time. We seal and coat to make certain that the life of the asphalt is extended far into the future.
Over-time, asphalt can become brittle. As a result, this can lead to cracking due to its inability to bend and flex. Asphalt real-coat provides a waterproof membrane which allows the pavement to shed water and also slow down the oxidation process.
Asphalt seal-coat also increase the surface friction. Over time asphalt can begin to wear down and so does the fine material on its surface. This process is called raveling. This can cause the surface to become smooth and slippery. This could cause very dangerous situations. Sealcoat increase the texture of the pavement and increases friction.