Should I seal my new concrete driveway in New Brunswick?

Yes — sealing a new concrete driveway in New Brunswick is not optional. It is one of the most cost-effective things you can do to protect a significant investment, and skipping it in NB's climate will shorten your driveway's lifespan dramatically.

New Brunswick concrete faces a uniquely punishing combination: 150+ freeze-thaw cycles per year, heavy road salt exposure from November through April, and coastal salt air in communities near the Bay of Fundy, Shediac, and the Gulf of St. Lawrence coastline. Unsealed concrete is essentially a sponge — its porous surface absorbs water and dissolved salts, which then freeze and expand within the concrete matrix, causing the surface deterioration (called scaling or spalling) that makes NB driveways look like gravel within a few years.

Wait before you seal. A new concrete driveway needs to cure fully before sealing — minimum 28 days, and ideally 60-90 days in NB conditions. Sealing too early traps moisture in the concrete and can cause surface blistering and adhesion failure. If your driveway was poured in late summer or fall, wait until the following spring after one full winter to seal it.

Choose the right sealer for NB conditions. A penetrating silane-siloxane sealer is the best choice for NB driveways. It soaks into the concrete and chemically bonds to the pores, repelling water without changing the surface appearance or creating a film that can peel. Cost is roughly $40-$80 per gallon, covering 150-250 square feet. For a typical two-car driveway (400-600 sq ft), budget $100-$250 in materials. Avoid acrylic sealers for driveways exposed to vehicle traffic and salt — they sit on the surface as a film and will peel in NB conditions, creating a new maintenance headache.

Application is a manageable DIY project. Clean the driveway thoroughly (pressure wash and degrease any oil spots), let it dry completely for 24-48 hours, then apply with a pump sprayer or paint roller on a dry day when temperatures are above 10 degrees Celsius and no rain is forecast for 24 hours.

Reapply every 2-3 years — penetrating sealers don't last forever. Many NB homeowners make sealing a fall maintenance task, applying a fresh coat in September before the salt season begins. This simple habit keeps driveway concrete in excellent condition for 30-40 years. For driveways that also receive de-icing products, this regular sealing schedule is particularly important.