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Whether you should resurface or replace your asphalt driveway heavily depends on its condition. If the foundation is solid and the damage is minor, resurfacing is your best bet because it’s more affordable and faster than replacing the driveway. But if your driveway has foundational problems and/or severe damage, like large, deep cracks and potholes, then it makes more sense to replace it. 

The main difference between asphalt and blacktop is that asphalt has a lower ratio of bitumen—a low-grade tar-like crude oil—than blacktop. While blacktop is heated to 300 degrees or more, hot-mix asphalt is heated to a lower temperature, typically between 275 and 300 degrees Fahrenheit. Consult an asphalt driveway professional about which type of material is the best fit for your future asphalt driveway.

Asphalt driveway sealer lasts approximately one to three years. Although the industry standard is to add fresh sealant every two years, this ultimately depends on where you live. Your driveway is subjected to elements like harsh sunlight, freezing temperatures, precipitation, and extra wear and tear that comes from foot traffic and heavy cars. If you start noticing small cracks or uneven drying on your driveway, it’s a sign that your previous seal coat has run its course and your driveway needs a new one.

Ideally, you should seal your driveway when there won’t be rain for several days, but at a minimum, there can’t be rain for at least 24 hours. If it rains shortly after you seal your driveway, the water can wash away the sealer and render your work useless. You’ll have to wait for your driveway to dry out and try applying again. Note that some sealers—like oil-based sealers or specialty fast-drying sealers—may cure faster. Ask your contractor for information on timing before the install, and if there’s rain in the forecast, postpone the job.