Labor cost to seal concrete typically runs $0.50-$1.50 per square foot for straightforward cleaning and sealer application, with higher rates when repairs, stripping, or difficult access are involved. A 600-square-foot driveway often costs $300-$900 in labor; surface condition, sealer type, and local contractor rates drive the final quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Labor per square foot | $0.50 | $1.00 | $1.50 | Basic cleaning and application |
| Labor for 600 sq ft | $300 | $600 | $900 | Standard driveway, labor only |
| Labor with heavy preparation | $1.50/sq ft | $2.50/sq ft | $4.00/sq ft | May include stripping or grinding |
| Contractor hourly rate | $40 | $65 | $100 | Varies by location and crew |
What labor usually costs for a concrete sealing job
For a clean, sound surface, contractors commonly charge $0.50-$1.50 per square foot for labor alone. That generally covers routine washing, masking nearby areas, applying one or two coats, and basic cleanup. Small projects may have a minimum labor charge of $150-$300, even when the square footage is low.
For a typical 600-square-foot driveway, budget about $600 in labor before sealer, repairs, or special preparation. A contractor may quote a combined installed price rather than separate labor and materials; ask for the labor portion and included prep in writing. Assumptions: standard concrete, normal access, and a common penetrating or film-forming sealer.
How washing, repairs, and application appear on quotes
Labor charges vary depending on whether preparation is limited to washing or requires substantial surface work. The table shows common labor-only allowances; tasks may be bundled, and not every project needs each one.
| Labor task | Typical rate | Common scope | When it applies |
|---|---|---|---|
| Wash and dry | $0.15-$0.40 per sq ft | $90-$240 for 600 sq ft | Dirt, light mildew, routine prep |
| Crack or joint preparation | $1-$4 per linear ft | Cleaning and filling small gaps | Visible cracks or open joints |
| Sealer application | $0.25-$0.75 per sq ft | $150-$450 for 600 sq ft | One or two coats, accessible surface |
| Stripping or grinding | $1-$3 per sq ft | $600-$1,800 for 600 sq ft | Failed coating or poor adhesion |
Preparation can cost as much as application when old coating or surface damage needs correction. Material, equipment rental, disposal, and taxes may be listed separately, so a labor-only rate should not be compared directly with a complete project quote.
Why slab size and surface condition change the rate
Square footage matters, but the condition and layout of the concrete can matter just as much. Large, open slabs usually cost less per square foot because setup and cleanup are spread across more area. Small patios, narrow walkways, and sections divided by landscaping may require more masking and repositioning.
Expect a noticeable labor increase when the job includes more than routine washing and coating. As a practical threshold, cracks totaling over 50 linear feet may add $50-$200 or more in repair labor. Removing a coating from 500 square feet can add roughly $500-$1,500, depending on coating thickness and grinding access. Dense, polished, or previously sealed concrete may also need an adhesion test or extra mechanical preparation.
How many hours a sealing crew needs on site
A two-person crew may spend 3-6 labor hours on a straightforward 500-800-square-foot driveway, including washing, setup, application, and cleanup. The surface then needs drying and curing time, which can extend the calendar schedule even though the crew is not present. Damp weather, shade, or poor drainage can delay application.
Labor estimates can be checked with this simple calculation: . For example, 8 combined crew-hours at $65 per hour equals $520 in labor. Ask whether the quote counts crew-hours or elapsed job hours, since two workers on site for four hours represent eight labor-hours.
Regional labor rates from rural areas to major metros
Local wages, travel distance, and contractor demand can shift labor pricing. Rural markets may come in about 10%-20% below a national midpoint when several contractors compete nearby, while major coastal metros can run 20%-40% higher. These are planning adjustments, not guaranteed local rates.
Use the per-square-foot range as a starting point, then compare local bids for the same preparation and coat count. A low quote may exclude washing, crack filling, or old-sealer removal, while a higher quote may include those tasks. Ask whether travel or a minimum charge applies to small jobs outside a contractor’s service area.
When extra prep and removal add labor charges
Pressure washing, crack treatment, masking, and removal of an existing coating can change the labor total. A basic wash may add $90-$240 for a 600-square-foot slab; filling isolated small cracks may add $50-$200. Stripping or grinding can add $1-$3 per square foot, especially if debris must be contained or removed.
Confirm that the concrete will be fully dry before application. Sealing wet concrete can compromise adhesion, so a contractor may need to return after drying rather than apply immediately after washing. Furniture moving, plant protection, tight access, and drainage problems can also add time. Get any extra-work rates in the estimate before work begins.
How to reduce concrete sealing labor without cutting corners
Clear furniture, vehicles, planters, and loose debris before the crew arrives; confirm that the contractor accepts customer-prepared surfaces. Grouping a driveway, walkway, and patio into one visit may reduce repeated setup or minimum charges. Scheduling during mild, dry weather can also prevent costly delays or return trips.
Control the scope by asking which preparation steps are necessary for adhesion and which are optional upgrades. Compare at least two itemized bids that specify square footage, washing, crack work, removal, coat count, and cleanup. Avoid paying for grinding or stripping unless the existing finish or surface condition requires it, and do not choose a lower labor rate if it omits essential preparation.