Concrete Sealing in Eagan, MN

How Minnesota winters wear out concrete

Concrete is full of tiny pores. When meltwater soaks in and then freezes overnight, it expands and puts pressure on the surface. Do that dozens of times a winter in Dakota County and the top layer can start to flake off, a type of damage called scaling. Road salt makes it worse. Salt lets more water soak in, raises the number of freeze-thaw cycles at the surface, and certain deicers attack the concrete chemically.

Most of that damage starts where salty slush collects: the garage apron, the first driveway panel, the bottom of steps and the strip of sidewalk along the street. Those are the spots a good sealer protects most.

The sealer we recommend

For most outdoor concrete in Eagan, we use a penetrating silane or siloxane sealer. It soaks below the surface and makes the pores repel water, while still letting the slab breathe. It does not leave a film, so there is nothing to peel or turn slippery on an icy morning, and it does not change the look of a plain broom finish. A good penetrating sealer typically protects for several years before it needs another coat.

For decorative or colored concrete, we may use a breathable film-forming sealer instead. Our stained concrete page has more on finishes for those surfaces.

Garage floors and salt slush

Every winter, cars carry chunks of salty slush into the garage, where they melt into puddles that sit for days. That brine soaks in and can pit the floor, especially near the door. A sealed floor resists the brine, and stains wipe up more easily. For a tougher finish, see our garage floors service.

Timing matters

Most sealers need surface temperatures above about 50 degrees and a dry slab to bond and cure. In Eagan, that leaves a window from roughly May to early October. Late summer and early fall is the most popular time, because it protects concrete right before the salt trucks come out. Once nights start dropping below freezing, it is usually too late to seal until spring.

New concrete needs to cure before sealing, typically around a month. Industry groups also advise against using deicing salts on new concrete during its first winter. If your driveway was poured in late fall, use sand for traction that season and plan on sealing the next summer. See our concrete driveways page for new installs.

Our process

1. Pressure wash the concrete and remove dirt, oil and old salt residue.
2. Repair small cracks and patch shallow scaling where needed.
3. Let the slab dry fully, usually a day.
4. Apply the sealer evenly with a low-pressure sprayer and back-roll to work it in.
5. Keep traffic off for the time the product requires, often a few hours for walking and a day for cars.

What else helps

Shovel early so less snow gets packed into ice. Use sand, or deicers labeled safe for concrete, and use them sparingly. Rinse salty slush off the driveway and garage floor on warmer days. Keep downspouts pointed away from walks and steps so they do not create ice patches. Our concrete steps and concrete sidewalks pages cover replacing pieces that are already too far gone.

Patios and pool areas

Backyard patios do not see road salt, but they still get soaked by snowmelt every spring and baked in July. Sealing them keeps out water, grill grease and leaf stains from the oaks and maples that shade so many Eagan yards. For colored or stamped patios, we use a breathable sealer that brings back the color without trapping moisture. Our concrete patios page covers new installs.

Sealing questions

Can sealing fix flaking that is already there?

It slows further damage, but does not restore lost surface. Badly scaled areas may need resurfacing.

Where do you work?

Eagan, Apple Valley, Burnsville, Inver Grove Heights, Mendota Heights and Rosemount.

Seal before the snow flies Call (651) 427-1250. We will check your concrete and schedule sealing while the weather is still warm enough.