Sealing isn't mandatory, but in Western New York, it's the best protection for broom-finish concrete.
The right sealer reduces moisture absorption, limits salt penetration, and makes the surface easier to maintain after a rough winter.
The key is picking the right product, because the wrong sealer on a textured concrete surface can actually create a safety hazard.
We typically use silane-siloxane penetrating sealers because they work below the surface, chemically bonding with the concrete to repel moisture without changing how the slab feels or looks.
For broom-finished concrete, this is what we normally install; the texture stays intact, traction isn't compromised, and the surface can breathe rather than being trapped under a film.
While acrylic film-forming sealers can give a wet look that some homeowners like, they are often a liability on outdoor broom-finished concrete in WNY.
These surfaces see constant rain and snowmelt, and a film-forming sealer can become slick when wet or trap moisture if applied incorrectly.
In our experience, penetrating sealers are much better suited for most exterior applications in the Buffalo area.
Just remember that timing is everything when applying these products. You should never seal a damp slab or apply sealer in the direct mid-afternoon sun during a July heatwave, as sealers can flash-dry, leading to bubbling or a blotchy finish.
Applying sealer in the early morning on a dry, shaded surface when temperatures are mild will give you the cleanest, most reliable finish.