The first application of sealer on a new parking lot should occur around one year after installation. This will allow some of the asphalt to lose some of its new oils and promote good sealer adhesion. Parking lots with very heavy traffic will likely need sealing or touch ups every year in the high traffic areas. Parking lots with medium to low traffic can go two to three years before resealing. Cracks and pot holes should be filled and repaired every year.