Concrete sealer typically costs $1-$3.50 per square foot when professionally applied, or about $500-$1,750 for a 500-square-foot area. The concrete’s condition, sealer type, surface preparation, and local labor rates determine where a quote falls; DIY material costs are generally lower.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Professional application | $1 per sq ft | $2.25 per sq ft | $3.50 per sq ft | Includes routine prep and labor |
| 500-sq-ft project | $500 | $1,125 | $1,750 | Standard residential slab |
| DIY sealer materials | $0.15 per sq ft | $0.45 per sq ft | $0.90 per sq ft | Product price varies by type |
| Cleaning and preparation | $0.15 per sq ft | $0.50 per sq ft | $1.50 per sq ft | More if stains or old coatings need removal |
Assumptions: Typical U.S. residential concrete, standard sealer, sound surface, and ordinary access; local quotes vary.
What a 500-square-foot concrete sealing job costs
For a driveway, patio, garage floor, or similar surface, a contractor commonly charges $1-$3.50 per square foot for cleaning, basic preparation, and sealer application. That puts a 500-square-foot job at roughly $500-$1,750, with about $1,125 as a practical midpoint.
Most standard projects land near $2-$2.50 per square foot when the concrete is clean and in good condition. Small jobs may have a minimum charge of $250-$500, so a short walkway can cost more per square foot than a large slab. Decorative finishes, significant repairs, or specialty products can push the price above the typical range.
How cleaning, sealer, and labor shape the quote
Quotes may bundle each task into one rate or list it separately. The breakdown below shows typical costs for a 500-square-foot residential surface; unusually difficult prep or premium products can exceed these ranges.
| Quote component | Low | Average | High | What changes the charge |
|---|---|---|---|---|
| Cleaning and prep | $75 | $250 | $750 | Grease, mildew, coating removal |
| Sealer materials | $75 | $225 | $450 | Product type and number of coats |
| Application labor | $250 | $500 | $900 | Access, edges, surface texture |
| Minor repairs and supplies | $0 | $150 | $400 | Crack filling or masking |
| Delivery or disposal | $0 | $50 | $150 | Equipment or waste handling |
For example, 5-8 labor hours at $50-$100 per hour equals $250-$800 before materials and other charges.
Preparation and labor often account for more of the bill than the sealer itself. Ask whether washing, drying time, crack patching, and a second coat are included.
Which slab conditions and sealer specs raise the price?
Surface condition is a major cost driver. A recently cleaned slab may need only light washing, while oil stains, peeling sealer, or embedded dirt can add $0.50-$2 per square foot for specialized cleaning or removal. Cracks wider than about 1/4 inch may need repair before sealing, often adding $2-$6 per linear foot depending on the repair method.
Porous or heavily weathered concrete may require two coats rather than one, increasing material use and application time. A 1,000-square-foot surface is often less expensive per square foot than a 150-square-foot entry because setup and travel costs are spread over more area. Get the quote based on measured area and stated coat count, not a vague “seal the slab” description.
What concrete sealer prices look like across U.S. regions
Labor rates and contractor availability can shift installed prices. In lower-cost rural and Midwestern markets, straightforward sealing may run around $1-$2.50 per square foot. Many suburban markets fall near $1.50-$3.50, while dense coastal metros can be 15%-35% higher than a comparable lower-cost market.
These are directional differences, not fixed regional price lists. A rural location may also incur a travel or minimum-service fee, while urban access restrictions and parking can raise labor time. Compare two or three local bids using the same surface area, prep scope, sealer type, and number of coats.
How long application takes and what labor includes
A two-person crew can often clean and seal a 400-600-square-foot surface in about 4-8 working hours, excluding drying and cure time. Contractors may require 24-48 hours without rain before application and typically keep foot or vehicle traffic off the slab for the product’s specified cure period.
Labor rates commonly work out to $50-$100 per worker-hour, but many companies price the complete job rather than billing hourly. Complex borders, steps, furniture moving, and limited access add time. Confirm who moves outdoor items and whether the price includes return visits or weather rescheduling.
Penetrating and acrylic sealers have different price points
Penetrating silane, siloxane, or similar products generally cost about $0.25-$0.90 per square foot for materials. They soak into the concrete and usually preserve a natural appearance, making them common for driveways and walkways. Acrylic products often cost $0.15-$0.60 per square foot for materials and can leave a visible sheen, though some surfaces need periodic recoating.
Installed pricing depends on preparation and labor as well as the product. A decorative acrylic finish may need careful application, while a penetrating sealer may need more product on porous concrete. Choose based on the slab’s exposure and desired finish, not material price alone. A film-forming coating is not interchangeable with every penetrating sealer, especially on damp or previously coated concrete.
Where to trim a concrete sealing estimate
Combining adjacent areas, such as a patio and walkway, can reduce repeated setup charges. Moving vehicles, planters, and furniture before the crew arrives may avoid labor add-ons. For DIY work, compare coverage per gallon and account for two coats if the product label or surface condition calls for them.
Do not skip cleaning or apply sealer over a failing old coating to lower the bid; poor adhesion can lead to peeling and early rework. Instead, request separate prices for washing, coating removal, repairs, and application. Keep optional color enhancement or high-gloss upgrades out of the base quote unless they solve a specific need.