What type of concrete sealer is best for NB driveways?

A penetrating silane/siloxane sealer is the best choice for concrete driveways in New Brunswick. It protects the concrete from the inside without changing its appearance, resists the damage from de-icing salt and freeze-thaw cycling, and lasts 2–4 years between reapplications.

New Brunswick driveways face a specific combination of attacks that makes sealer selection important: 150+ annual freeze-thaw cycles, heavy road salt exposure from November through April, and the general moisture load of a Maritime climate. The wrong sealer can fail, peel, or trap moisture — making things worse rather than better.

Penetrating sealers (silane, siloxane, or silane-siloxane blends) work by chemically bonding with the concrete below the surface and creating a hydrophobic barrier in the pores. Water beads up and runs off rather than being absorbed. Salt solutions cannot penetrate deeply enough to cause freeze-thaw damage at the surface. The concrete looks the same — no sheen, no colour change — just protected. Cost is $40–$80 per gallon, covering 150–300 sq ft depending on how porous the concrete is. A typical two-car driveway takes 2–4 gallons. Reapplication every 2–3 years is standard in NB conditions.

Acrylic film-forming sealers leave a surface coating — either matte or glossy — that enhances the appearance of the concrete. They are popular on stamped and decorative concrete because they bring out colour and add shine. The problem on NB driveways is durability: acrylic sealers sit on top of the concrete surface and are vulnerable to peeling, flaking, and wear from vehicle traffic and freeze-thaw movement. They typically need reapplication annually on driveways. They are better suited to covered patios and decorative surfaces than high-traffic driveways in a Maritime climate.

Epoxy and polyurea coatings are designed for garage floors — they are film-forming coatings that bond very well to properly prepared concrete. They are not appropriate for exterior driveways because they are not UV-stable (they yellow and chalk), and the concrete expansion-contraction movement outdoors will cause coating delamination.

Timing matters. New concrete should cure for a minimum of 28 days before sealer application. Some contractors recommend waiting a full year before applying penetrating sealer to allow any efflorescence (white calcium deposits that leach out of new concrete) to dissipate. At minimum, apply a penetrating sealer before your concrete faces its first NB winter. Do not skip this step — it is the single most impactful maintenance investment you can make in the longevity of your driveway.

Get matched with a concrete contractor who includes sealer application as part of the project package through New Brunswick Concrete.