Asphalt crack sealing is vital to the lifespan of an asphalt driveway. Keeping cracks sealed up from moisture is extremely important and ultimately should be done every year. As a matter of fact, the best time to do this is in the fall when cracks are opened up at their widest. This will minimize the amount of moisture entering the cracks during those freeze and thaw cycles in the winter. In the summer, when the cracks expand, the crack sealer then gets squeezed tightly keeping rain water from entering those cracks. This will help extend the life of your asphalt driveway tremendously.
Some contractors will actually use tar and sand to seal the cracks in your driveway which is not the proper way to perform this service. See our report on “The Most Common Ways Asphalt Repair, Maintenance and Sealcoating Contractors Rip Us Off and How To Avoid Them" and avoid the pitfalls of hiring the wrong contractor!