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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.

Regular sealing, drainage management, and debris removal help prevent asphalt deterioration, protecting and extending surface life.

You should always power wash your driveway before applying a sealant. At any given time, your driveway could be covered with algae and moss, tire residue, oil and rust stains, and any combination of leaves, twigs, and dirt. If you skip power washing, you’ll be trapping the dirt and grime beneath the sealant and lowering its chance of cementing itself to your driveway. While you can expect the cost to pressure wash your driveway to average between $100 and $350, the few hundred dollars beats an unattractive driveway or paying extra to reapply your driveway sealer.

On average, asphalt dries within 24 to 72 hours, meaning it’s solid enough for light traffic—walking and careful driving. Full curing—when asphalt reaches peak strength—can take anywhere from three months to a year. During that time, heavy loads and sharp objects can leave marks. Weather, asphalt mix, and thickness all affect how quickly it dries and cures. If you want your asphalt to last, treat it gently until it’s fully cured. For the best results, check with a professional asphalt contractor for their advice.