Concrete Sealing in Oshkosh, WI

Why exterior concrete needs sealing

Outdoor concrete here faces a tough cycle. Rain and snowmelt soak in, freeze, expand and thaw again dozens of times every winter. De-icing salt tracked onto steps and walks makes the damage worse. Over a few seasons the surface scales and pops, exposing aggregate and creating rough patches. A good sealer reduces how much water and salt get in, which slows that damage significantly.

Types of sealers

• Penetrating sealers (silanes and siloxanes) soak into the concrete and repel water without changing its look or making it slippery. They are our usual choice for walks, steps and driveways.
• Film-forming sealers (acrylics) sit on the surface, add a slight sheen or wet look and protect against stains. They suit decorative and stamped patios, but need reapplication more often.
• Interior sealers and densifiers for basement and storage slabs that need dust control without a full coating.

Our process

1. Inspect the concrete for cracks, scaling and previous sealers.
2. Clean thoroughly, often with a pressure washer and degreaser for oil spots.
3. Repair cracks and small spalls where needed.
4. Let the concrete dry.
5. Apply the sealer evenly with sprayers and rollers.

Timing

The best time to seal exterior concrete is late summer or early fall, before the first freeze and after the concrete has had a dry stretch. Sealers need dry concrete and moderate temperatures. New concrete usually needs to cure for about a month before it can be sealed.

How often to reseal

Penetrating sealers typically last several years. Acrylic sealers may need recoating every year or two, especially in high-traffic areas. A simple test: if water no longer beads on the surface, it is time to reseal.

Areas we seal

• Front steps and porches
• Sidewalks and walkways
• Patios and pool decks
• Garage aprons
• Stamped and decorative concrete
• Boat launch pads and lakeside slabs

Sealing versus coating

Sealing is a lighter option than a full coating. It protects without changing the look much. For garage floors that take heavy salt and traffic, a full epoxy coating provides more protection. For driveways, see our driveway coating options.

Slip resistance

Penetrating sealers do not change the texture. Film-forming sealers can be slicker, so we add a grit additive on steps and walks. Safety comes first on any surface people use in winter.

Caring for sealed concrete

Shovel promptly so snow does not melt and refreeze on the surface. Use calcium magnesium acetate or sand instead of rock salt on steps when you can, since harsher salts speed up scaling. Sweep leaves off in fall so they do not stain. Rinse the surface in spring to wash off winter residue. These small habits extend the life of both the sealer and the concrete underneath.

Choosing the right sealer

Not every sealer suits every surface. Penetrating silane and siloxane sealers soak into the concrete and leave almost no visible film, which makes them a good choice for driveways, walks and porch steps where traction matters. Acrylic sealers sit on top and add a slight sheen, which suits patios and decorative concrete but wears faster under tires. Inside garages and basements, a densifier can harden the surface and cut dusting. We match the product to how the surface is used, how much sun it gets and how much salt it sees each winter, and we explain the tradeoffs before you decide.

Protect your concrete

Contact us for a quote on sealing your steps, walks or patio before winter.