Concrete Sealing in Vancouver

Concrete Sealing for Vancouver Strata and Commercial Buildings

Concrete sealing means different things depending on who you ask. A residential driveway sealing company applies a decorative or basic penetrating sealer to a flat, at-grade slab with nothing structural riding on the outcome. A strata or commercial building has a different problem entirely: parkade slabs with occupied space or another level below them, exterior concrete walls absorbing wind-driven rain year-round, and balcony and podium surfaces that are structural elements, not just walking surfaces. Sealing these correctly requires understanding which type of concrete you actually have and what it needs, not applying a one-size-fits-all driveway product to a building envelope.

Penetrating Sealers vs. Coatings: Knowing the Difference

A penetrating sealer, typically a silane or siloxane, soaks into the concrete and makes it water-repellent, slowing how fast water and chloride move through the intact surface. A silicate densifier reacts with the concrete to harden the surface. Neither forms a continuous film, and neither can bridge a crack. That makes a penetrating sealer a legitimate, cost-effective choice for at-grade concrete with nothing below it to protect, like an exterior visitor parking pad or an exposed exterior wall on grade. It is not a substitute for true waterproofing on a suspended slab or anywhere occupied space sits below the concrete.

When Sealing Is Not Enough

A suspended parkade slab, a balcony deck, or any concrete element with living or parking space underneath it needs to actually stop water, not just slow it. On those elements, a full waterproofing membrane system is the correct scope, not a penetrating sealer. We tell clients honestly when their concrete needs a membrane rather than a sealer, even when the sealer is the cheaper quote, because a sealer sold as waterproofing on a suspended slab is not a lesser version of the right product, it is the wrong product. Our parkade crack repair guide and traffic membrane vs. sealer comparison cover this distinction in detail for parkade decks specifically.

Exterior Wall and Balcony Concrete Sealing

Exposed concrete walls and balcony surfaces on Metro Vancouver buildings take a steady beating from wind-driven rain and, on upper floors, UV exposure. A penetrating sealer applied to sound, uncracked exterior concrete slows moisture absorption and reduces the freeze-thaw surface damage that accumulates over successive winters. Where the concrete already shows cracking or surface deterioration, that needs to be addressed before sealing, since sealing over active damage just buries a spreading problem rather than solving it.

Why This Is Not Decorative Concrete Sealing

Search results for concrete sealing are dominated by residential driveway and patio sealing companies applying decorative or basic protective sealers to flat, at-grade, non-structural slabs. That is a genuinely different job from sealing a parkade slab, a balcony deck, or an exterior structural wall on a strata or commercial building, where the consequences of getting the product wrong include chloride reaching rebar, structural corrosion, and eventual spalling. If your building's concrete sealing need involves anything other than a flat driveway or patio, you need a building envelope contractor who understands the structural stakes, not a decorative sealing company.

How Much Does Concrete Sealing Cost in Vancouver?

Cost depends on the concrete type, whether it is on-grade or suspended, surface condition, and access requirements. A penetrating sealer on sound at-grade concrete is a lower per-square-foot cost than a full waterproofing membrane system, but if your assessment shows the concrete actually needs a membrane, that is not a cost comparison, it is a different scope entirely. We scope the assessment first and quote the correct product for what your concrete actually needs.