Concrete Wash & Seal
in Seattle & the Eastside
Clean, seal, and protect your concrete driveways, sidewalks, and patios. Enhance appearance, prevent damage, and extend surface life.
Professional Concrete Cleaning & Sealing
Your concrete driveway, walkways, and patio take a beating in the Pacific Northwest. Constant moisture, freezing temperatures, vehicle traffic, and biological growth all work against your concrete surfaces year-round. Regular professional cleaning and sealing is the most effective way to protect your investment and keep surfaces looking great.
Sealed concrete lasts significantly longer than unsealed concrete — sealing prevents water intrusion, freeze-thaw damage, oil absorption, and biological growth.
Why Seattle Concrete Needs Sealing
Unsealed concrete in our climate absorbs water, which expands during freezing and causes cracking. Moss and algae colonize porous surfaces quickly, creating slip hazards and surface degradation. Oil from vehicles penetrates and stains permanently without a protective barrier. A quality seal addresses all of these issues simultaneously.
Our Concrete Wash & Seal Process
Cleaning and sealing is a multi-step process — get any step wrong and the seal won't bond. Here's how we do it right.
Oil-Stain Pre-Treatment
We pre-treat oil stains and heavy soiling with targeted degreasers and multi-pass cleaning to minimize or eliminate staining before sealing.
Commercial Surface Cleaning
High-pressure surface cleaning with a commercial rotary cleaner delivers an even, streak-free finish, with edge and corner detailing using a turbo nozzle.
Rinse & Complete Dry
An HVLP (high-volume, low-pressure) final rinse, followed by complete drying — sealer will not bond to damp concrete, so this step is non-negotiable.
Professional Sealer Application
We apply a professional-grade penetrating or film-forming sealer, adding slip-resistant additives for walkways, steps, and entry areas.
Surfaces We Clean & Seal
From residential driveways to commercial lots, we clean and seal every kind of concrete surface:
Driveways
Single, double, and extended concrete driveways cleaned of oil, tire marks, moss, and staining, then sealed for protection.
Sidewalks & Walkways
Front walkways and sidewalks restored and treated with slip-resistant sealer for safety.
Patios & Pool Decks
Patio slabs and pool decks cleaned and sealed with anti-slip formulations for high-traffic wet areas.
Garage Floors
Garage floors degreased and sealed to resist oil absorption and make future cleanup easy.
Commercial Lots
Parking lots and loading areas cleaned for commercial and property-management clients.
Sports Courts
Basketball and sports courts cleaned and sealed to restore surface and appearance.
Why Homeowners Trust Us with Their Concrete
Oil-Stain Specialists
Targeted degreasing and multi-pass cleaning to minimize or eliminate stains other companies leave behind.
Freeze-Thaw Protection
Proper sealing keeps water out, preventing the freeze-thaw cracking that destroys PNW concrete.
Slip-Safe Finishes
Anti-slip additives on walkways, steps, and pool decks — safety built into every seal.
Commercial-Grade Equipment
Rotary surface cleaners and professional sealers for an even, durable, long-lasting result.
Licensed & Insured
Fully insured, with clear drying-time guidance and product info for every job.
Transparent Pricing
No hidden fees. Bundle with a house wash or paver sealing for combination savings.
Concrete Wash & Seal Pricing
Pricing depends on square footage, surface condition, staining, and whether you're cleaning only or cleaning and sealing. We provide transparent, itemized quotes with no surprise charges.
Area & Square Footage
Driveways, walkways, and patios are measured for an accurate quote. Larger areas and multiple surfaces scale predictably.
Condition & Staining
Heavy oil staining, moss, and neglect require additional pre-treatment and passes, accounted for upfront in your quote.
Clean vs. Clean + Seal
Sealing adds material and cure time but dramatically extends surface life. We'll help you decide what's worth it for your surfaces.
The fastest way to an accurate price is a free quote. We respond within 24 hours — often same day.
Frequently Asked Questions
How long does concrete sealing last?
A professional concrete seal typically lasts 2–5 years depending on the sealant type, traffic volume, and exposure to the elements. In Seattle's wet climate, we generally recommend resealing every 2–3 years for best protection.
Does sealing concrete make it slippery?
Quality sealers are available in both gloss and matte finishes, with anti-slip additives available for high-traffic areas. We always recommend and apply slip-resistant formulations for walkways, pool decks, and entry areas.
Can you remove oil stains from my driveway?
Yes — we specialize in oil stain treatment as part of our concrete wash process. Depending on the age and depth of the stain, we use targeted degreasers and multi-pass cleaning to minimize or eliminate staining before sealing.
How long before I can use my driveway after sealing?
Most concrete sealers cure within 24–48 hours for foot traffic and 72 hours for vehicle traffic. We provide specific drying time guidance for the product used on your job.
Have a question we didn't answer? Call (425) 298-7041 or submit a quote request — we respond within 24 hours.
Related Services
Concrete work pairs well with these surfaces — bundle for a complete, protected exterior:
Restore & Protect Your Concrete
Get a free, no-obligation concrete wash & seal quote for your Seattle or Eastside property. We respond within 24 hours — often same day — and serve Bellevue, Kirkland, Redmond, Sammamish, Bothell, and surrounding communities.
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