Sealing a concrete driveway every 2-3 years prevents water damage, cracking, staining, and freeze-thaw deterioration. It takes a few hours of work and dramatically extends the life of your concrete.
STEP 1: Clean the Driveway Thoroughly
Sweep the entire surface and remove weeds from cracks. Use a pressure washer or strong garden hose with a scrub brush and concrete cleaner to remove oil stains, dirt, and mildew. The sealer will not bond to a dirty surface. Let the concrete dry completely — at least 24 hours.
STEP 2: Fill Any Cracks Before Sealing
Now that you have the starting point, fill cracks under 1/2 inch wide with concrete crack filler or caulk. For larger cracks, use a patching compound and smooth it level with the surface. Let all repairs cure fully according to product directions before applying sealer.
STEP 3: Choose the Right Sealer
Now that the first pieces are in place, penetrating sealers soak into the concrete and protect from within — best for driveways because they do not create a slippery film. Film-forming sealers sit on top and add a glossy or satin sheen but can become slippery when wet. For driveways, a penetrating silane or siloxane sealer is the safest and most durable choice.
STEP 4: Apply the Sealer Evenly
To strengthen your results even more, pour sealer into a paint tray and apply with a 3/8-inch nap roller on an extension pole, working in even, overlapping passes. Start at the far end and work toward the garage so you do not paint yourself in. Apply one thin, even coat — thick application causes bubbling and peeling.
STEP 5: Allow Full Cure Time Before Use
To bring everything together and finish strong, keep foot traffic off for at least 4 hours and vehicles off for 24-48 hours depending on the product. Most sealers reach full cure in 72 hours. Do not seal if rain is expected within 24 hours — moisture trapped under fresh sealer causes clouding and adhesion failure.
PRO TIPS
Q: When is the best time of year to seal a concrete driveway?
A: Seal your driveway in early fall when temperatures are between 50-80°F with no rain in the forecast for 48 hours. Sealing in direct summer heat causes the sealer to dry too fast and not penetrate properly.
Q: How many coats of sealer does a driveway need?
A: A pressure washer makes driveway prep 10 times faster and gets the surface cleaner than scrubbing by hand. You can rent one from a home center for about $50-75 per day. It is worth every penny for this job.
Q: Do I need a pressure washer to clean a driveway before sealing?
A: Apply one thin coat — not two heavy coats. Over-application is the number one cause of sealer failure. The sealer peels, turns white, or becomes dangerously slippery. One proper coat provides 2-3 years of protection.
SUPPLIES NEEDED
Concrete sealer (penetrating type)
Pressure washer or garden hose with scrub brush
Concrete cleaner or degreaser
Concrete crack filler
Paint roller with 3/8-inch nap and extension pole
Paint tray
Broom
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