As a general rule, you should schedule professional asphalt sealing every 2-3 years. The frequency varies based on a variety of factors, including the volume and type of traffic your asphalt pavement receives, the climate and weather conditions in your area, and the quality of the initial installation and maintenance. Regular sealing is crucial to extend the lifespan of your asphalt, prevent damage from elements like water and UV radiation, and maintain the aesthetics of your pavement.