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Our concrete sealing and maintenance services in St Louis, MO protect your investment from moisture, stains, and freeze thaw damage. We clean surfaces, repair minor defects, and apply high quality sealers matched to your driveway, patio, or decorative concrete. Keep your concrete looking fresh and performing well year after year.
St. Louis Concreters provides professional concrete sealing throughout St Louis, MO, Missouri and the surrounding area. Our licensed, insured crew delivers safe, clean, on-time work with a free estimate before anything begins. Call (314) 207-8572 or request your free quote.
Concrete sealing that is built for St. Louis conditions
Concrete in St. Louis lives a hard life. Freeze-thaw cycles off the Mississippi, snow melt, road salt from I-64 and I-44, and hot, humid summers all push moisture in and out of your driveway, patio, or sidewalk. Without proper concrete sealing, that constant movement leads to scaling, pitting, surface flaking, and early cracking.
St. Louis Concreters designs concrete sealing and maintenance plans around those specific local stresses. We select sealers based on how your slab is used, how much sun it gets, and whether it is exposed to de-icing salts from city plows or your own winter maintenance. For many residential driveways we use a breathable, penetrating silane or siloxane sealer that blocks water and chloride absorption while still allowing trapped moisture to escape, which is critical in our freeze-thaw climate.
Our goal on every concrete sealing project is not just to make the surface look freshly cleaned. We focus on extending the service life of the concrete so you can delay costly replacement for many years.
Our step-by-step concrete sealing process
Effective concrete sealing is much more than spraying a product and walking away. St. Louis Concreters follows a detailed process that is tuned to St. Louis weather and soil conditions so the sealer bonds correctly and performs as advertised.
1. Inspection and moisture check. We start with a visual inspection for cracks, spalling, previous coatings, and drainage issues. Where needed, we perform simple moisture tests, such as plastic sheet or meter readings, to confirm the slab is dry enough to accept sealer. In our humid climate and clay-heavy soils, this step prevents sealer from trapping excess moisture below the surface.
2. Deep cleaning and surface prep. We remove surface dirt, mold, algae, tire marks, and oil using a combination of degreasers, scrubbers, and controlled pressure washing. For older slabs with light scaling, we may mechanically profile the surface with diamond grinding or wire brushing to give the sealer something to bite into. Any previous failed sealer or acrylic is stripped so the new product can perform properly.
3. Crack and joint maintenance. Before sealing, we route and fill structural cracks and repair isolated spalls with compatible repair mortars or polyurea fillers. We also clean out control joints and expansion joints, then re-caulk where necessary to keep surface water out of the slab base.
4. Product selection and application. Based on the inspection, we choose the appropriate sealer type: penetrating water repellent for driveways and sidewalks, high-solids acrylic or polyurethane for decorative stamped patios, or a slip-resistant system around pools. We apply with low-pressure sprayers, rollers, or both, maintaining the correct coverage rate and back-rolling to avoid lap marks. In the St. Louis area, we typically schedule this work in stable weather windows in spring or fall to avoid extreme heat or surprise cold snaps.
5. Curing, cleanup, and walkthrough. After application, we set clear traffic restrictions so vehicles or foot traffic do not damage the new sealer film while it cures. We perform a final walkthrough with you, point out how the surface should look once fully cured, and explain exactly how to care for the sealed concrete in the first 7 to 14 days.
Types of concrete sealers we use and when we use them
No single concrete sealer works best for every situation. St. Louis Concreters stocks and installs multiple professional-grade systems so we can match the product to your concrete and how you use it.
Penetrating sealers (silane, siloxane, and blended water repellents) are our go-to choice for most St. Louis driveways, sidewalks, stoops, and porches. They soak into the concrete and chemically bond below the surface, which means they will not peel. They significantly reduce water and chloride absorption, which is essential when your slab is regularly exposed to rock salt or magnesium chloride in winter. These sealers typically last 5 to 10 years, depending on traffic and exposure.
Acrylic film-forming sealers are often used on decorative or stamped concrete patios, colored concrete, or exposed aggregate. They enrich color and provide a satin to glossy finish. For outdoor use in Missouri we typically choose breathable, UV-stable acrylics with an added non-slip additive, especially around pools and sloped walks. These usually need refreshing every 2 to 3 years.
Polyurethane or polyaspartic topcoats are reserved for garages, interior floors, and certain high-end exterior applications. They offer excellent chemical and abrasion resistance, which is ideal if you park multiple vehicles, use floor jacks, or store lawn equipment in your garage. For exterior slabs, we carefully evaluate moisture levels and vapor transmission to avoid blistering.
When we visit your St. Louis property, we evaluate shade, drainage, traffic type, existing coatings, and budget, then clearly explain which system is most appropriate and why. You will know exactly what is going on your concrete and how long it can realistically be expected to last.
Maintenance plans that prevent costly concrete repairs
A single concrete sealing service is helpful, but a planned maintenance approach can easily double the practical life of your slab. At St. Louis Concreters we design maintenance schedules that match how your concrete actually wears, rather than using a one-size-fits-all calendar.
For residential driveways in the St. Louis metro, we typically recommend a penetrating sealer inspection every 3 to 5 years, with re-application when water no longer beads on the surface. For decorative acrylic-sealed patios, a lighter but more frequent touch is smarter: annual visual checks, periodic cleaning, and resealing every 2 to 3 years before the sealer completely breaks down. Around pools or hot tubs, we closely watch for slipperiness and UV fading.
Our maintenance visits can include pressure washing with correct PSI and fan tips that will not etch the concrete, reapplication of sealer only where needed, touch-up of joint sealant, and crack monitoring. We keep photos and notes from each visit, so over time you gain a clear record of how your slab is performing.
This kind of documented maintenance is especially useful when selling a home in St. Louis County or St. Charles County. Buyers and inspectors often flag deteriorated concrete as a negotiating point. Having a record from St. Louis Concreters that shows consistent sealing and maintenance can support your asking price or at least take one item off the punch list.
Common concrete problems we see in St. Louis and how we address them
The combination of clay soils, utility work, and winter road maintenance in our region produces a fairly predictable set of concrete issues. Understanding what you are seeing in your driveway or patio will help you make better decisions about sealing and repair.
Scaling and surface flaking are common on older driveways that have been heavily salted. Thin layers of the surface paste break loose, leaving a rough, pitted finish. If the damage is mild and the concrete is still structurally sound, we clean, perform spot patching, and apply a high-quality penetrating sealer to stop further salt intrusion. For more advanced scaling, we may recommend resurfacing rather than simple sealing.
Random cracking often comes from settlement in our expansive clay soils. Sealing will not glue cracked sections back together, but it is important because it keeps water from working into the crack and softening the base underneath. We clean, route, and fill significant cracks before sealing to slow further movement.
Prior sealer failure is something we see frequently when DIY products or mismatched sealers have been used. Peeling, whitening, or a blotchy appearance usually means a non-breathable sealer trapped moisture or was applied too thick in our humid conditions. We mechanically or chemically strip failing coatings, allow the concrete to dry thoroughly, then use a breathable system that is compatible with the concrete and local climate.
We are straightforward about what concrete sealing can and cannot solve. If a section has heaved from tree roots or has major structural damage, we will tell you that replacement is the right move and can provide a separate estimate for that work.
Pricing, scheduling, and what affects the cost of concrete sealing
Concrete sealing prices in St. Louis vary for reasons that go beyond square footage. St. Louis Concreters provides written, line-item estimates so you can see exactly what drives the cost on your property.
Key factors include the condition of the concrete (heavy cleaning, oil stain removal, stripping old sealer, and crack repair all add time and materials), the type of sealer (penetrating sealers generally cost more per gallon than basic acrylics, and high-performance polyurethanes are higher still), access and layout (tight side yards, many steps, or small broken-up areas take more labor than a wide-open driveway), and timing (if we must work around strict HOA hours or unusual staging needs, that can affect labor).
For most typical residential driveways in the St. Louis area, homeowners can expect professional concrete sealing to fall within a clearly explained range that we provide after seeing the site. We do not quote sight-unseen flat prices because two driveways of the same size can require very different levels of preparation.
We schedule most sealing projects for dry spells in spring and fall. If you are planning work near an upcoming home sale, major landscaping, or painting project, we coordinate timing so other trades do not damage the fresh sealer. Our crews show up with the necessary barricades and signage to keep vehicles off the surface until it is safe.
Local considerations: permits, HOAs, and choosing a St. Louis concrete sealing contractor
Concrete sealing itself typically does not require a building permit in St. Louis City or St. Louis County, because it is considered maintenance rather than structural alteration. However, you may need HOA approval for visible changes, such as a high-gloss finish on a front driveway or a color enhancement on a decorative patio. St. Louis Concreters is familiar with many area subdivision guidelines and can provide product data sheets or finish samples for your board if needed.
When you evaluate concrete sealing contractors in St. Louis, ask detailed questions about the specific products they plan to use, previous projects on similar concrete, and how they handle changing weather. A reputable contractor should be able to explain why a breathable sealer is usually better for our climate, how long you must stay off the surface, and what realistic maintenance looks like.
We carry proper insurance for residential and light commercial work, maintain safety training for our crews, and follow manufacturer specifications on coverage rates, temperature limits, and recoat windows. This is important because incorrect application can cause whitening, peeling, or slippery conditions that are expensive to fix.
If you are unsure whether your concrete is a good candidate for sealing, we offer on-site evaluations across the St. Louis metro. We inspect, test, and then tell you plainly whether sealing, repair, resurfacing, or replacement is the best investment for your property.
