Concrete Sealing for Wichita Driveways, Walks and Patios

Common scope

Clean, repair, dry, apply sealer, seal joints

Product types

Silane, siloxane and blends (penetrating); acrylic and similar (film-forming)

Timing

After cure, on dry concrete, in mild weather

Reapply

On the schedule the product label gives

Why sealing matters here

NRMCA explains that concrete saturated with water and exposed to freezing and thawing is susceptible to scaling, and that de-icing chemicals make it worse by increasing surface saturation and the number of freeze-thaw cycles (NRMCA, CIP 2: Scaling Concrete Surfaces). The National Weather Service office in Wichita lists about 103 days a year with a low at or below freezing (NWS Wichita, annual climate normals for Wichita, Salina and Chanute). A slab that drinks water in December and freezes that night is a slab that loses its surface over time. A sealer slows the water and salt down.

NRMCA's recommendations for protecting slabs in harsh winters include applying a commercially available silane- or siloxane-based breathable sealer or water repellent made for concrete slabs, following the manufacturer's directions, applying it when the concrete is reasonably dry, and noting that late summer, after a few dry days, is an ideal time (NRMCA, CIP 2: Scaling Concrete Surfaces).

Two families of sealer

Penetrating sealers

Silanes, siloxanes and blends soak into the pores and react to make them water-repellent. They leave little or no film, so the surface looks about the same and keeps its traction. They let water vapor escape, which is why they are called breathable. They are the usual choice for plain driveways, walks and steps.

Film-forming sealers

Acrylics and similar products form a thin layer on top. They add gloss or a wet look and deepen color, which is why they are common on stamped and colored concrete. They wear with sun and traffic, can become slippery when wet, and need periodic recoating. Some can trap moisture if applied over damp concrete, causing a cloudy look.

When to seal new concrete

New concrete needs to cure and dry before a sealer goes on. The product label sets the minimum age, and many specify that the concrete be dry for a day or more before application. Curing compounds used right after the pour are not the same as long-term sealers. Ask the estimator which product will be used for curing and which, if any, for sealing later, and whether they are compatible.

Timing in Kansas weather

Most sealers have temperature limits on the label and need dry weather before and after application. In Wichita, NWS normals show May as the wettest month at about 5.2 inches of precipitation, with June and August close behind, while late summer and early fall bring drier stretches (NOAA NCEI 1991–2020 monthly normals, Wichita Eisenhower airport station). That lines up with NRMCA's late-summer suggestion. A fall application before the first freeze, which NWS Wichita places around October 25 on average (NWS Wichita, annual climate normals for Wichita, Salina and Chanute), means the slab enters winter protected.

How often to reseal

There is no universal schedule. It depends on the product, how much sun and traffic the slab gets, and how much salt it sees. A simple test: sprinkle water on the surface. If it beads, the sealer is working; if it darkens the concrete and soaks in, it may be time. Follow the interval on the product label. The sealing schedule guide walks through a yearly routine.

Joint and crack sealing

Sealing the face of the slab does not seal its joints. Open joints let water reach the base, and on clay soil that can feed swelling and settling. Joints and cracks are cleaned and filled with a flexible sealant rated for concrete movement. NRMCA's joint guidance calls for joint filling materials as specified (NRMCA, CIP 6: Joints in Concrete Slabs on Grade). Reseal joints when the old sealant has split, pulled away or gone hard.

Preparing for a sealer

1. Clean off dirt, oil, rust and organic stains; some need specific cleaners.
2. Repair spalls and open cracks first so the sealer is not bridging damage.
3. Let the slab dry fully after washing.
4. Apply in the temperature range and coverage rate on the label, avoiding puddles.
5. Keep traffic off for the time the label lists.

What sealing will not do

A sealer will not fix scaling that has already happened, lift a sunken panel or close a moving crack. If the surface is already flaking badly, see repair and resurfacing. If panels have heaved, read about lifting and leveling.

The estimate factors page explains what changes a sealing job: area, condition, cleaning, joint footage and product type.

Sizing up the job: see what changes the size of a sealing job on the estimate-factors page. It lists what moves the scope, never a price.

Further reading

• Freeze-Thaw Cycles and Wichita Concrete
• Ice Melt, Salt and Concrete Scaling
• A Year-Round Sealing Schedule for Kansas Concrete