Driveway Sealcoating questions, answered by experts
Maintaining a driveway depends on its material. For concrete and asphalt, it's best to clean the surface thoroughly twice a year with a stiff broom and a pressure washer to remove accumulated dirt and debris. Sealing the driveway is crucial to protect it from water damage and freeze-thaw cycles. Before applying a sealant, pressure wash the surface to remove any loose sealant, dirt, or stains, as sealing over them will trap them. Any cracks or expansion joints should be filled with a flexible polyurethane caulk or asphalt sealer. In colder climates, use sand instead of salt for de-icing. Sand helps melt snow and ice without accelerating the freeze-thaw process, which can cause cracks.
There are more pros than cons, but there are a few disadvantages to sealing your driveway to be aware of. Sealant can make the surface slippery, which can be a hazard, especially when the driveway gets wet. Look for sealants with abrasive additives to help counteract this. You’ll also need to remember to reapply your sealant every two years and budget for the expense that comes with it.
Most sealing projects take 1-2 days, including drying time before allowing traffic.
It is not recommended to seal brand-new asphalt immediately. You should wait at least three months after installation to allow the asphalt time to cure properly. Applying a seal coat too soon can trap the asphalt's oils and chemicals, preventing it from fully hardening. This can result in a weaker surface that is more susceptible to damage. After the three-month curing period, sealing the asphalt is beneficial as it can extend its lifespan by protecting it from water, UV rays, and other damaging elements.
Driveway installation is challenging. While chip seal might sound easier to apply than asphalt, the process still involves heavy machinery and professional skills. Unless you come from a construction background, we recommend hiring an asphalt company to chip seal your new driveway. If you are paving the driveway entirely with chip seal, expect to pay $5 to $10 per square foot.
The Freeman, SD homeowners’ guide to driveway sealcoating
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