Concrete Sealing
in Portland, OR
Keep Your Protected After It's Cleaned
Just had the driveway pressure washed and want it to stay that way? Portland’s rain works into unsealed concrete, feeding moss and letting stains soak in permanently. We apply penetrating or film-forming sealers to driveways, walkways, and patios to protect your drive.
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Video demonstration of our soft washing service.
Why Portland Concrete Deteriorates and What Sealing Actually Prevents
Concrete is porous. In Portland, that means eight months of rain soaking in, and then feeding the problems you keep paying to clean off:
- Moisture and freeze-thaw cracking. Water in the pores expands during cold snaps, spalling and cracking the surface.
- Permanent staining. Oil, rust, and tire marks wick into unsealed concrete where no pressure washer can reach them.
- Fast regrowth. Moss and algae re-establish quickest on damp, porous surfaces; sealing is the reason some driveways stay clean for years while others green up by spring.
- UV dulling. Unprotected surfaces fade and weaken over time.
Sealing closes the pores. It’s the difference between cleaning your driveway every year and cleaning a sealed surface that mostly rinses itself.
The one rule: sealer only goes on clean, dry concrete. That’s why sealing pairs naturally with pressure washing or driveway cleaning: the wash opens the surface, the sealer locks it.
Get a Free Sealing Estimate Estimate
Not sure where to start? That’s normal. We’ll ask a few quick questions about your driveway, then recommend the best-fit cleaning and sealing option for your project and budget.
What Concrete Sealing Costs in Portland
Most concrete sealing projects in Portland cost between $300 and $1,250. Your exact price depends on: sealer type; penetrating sealers and film-forming sealers price differently; surface condition: heavy staining, oil spots, or repairs needed before sealing; access and complexity; tight corners, steps, and slopes take longer than an open slab, whether cleaning is needed first; sealing goes on clean concrete, so a wash is part of nearly every job.
You’ll get an exact, itemized quote before we schedule anything: usually the same day. Send us your address and a couple of photos.
Small Walkway or Sidewalk
Typical Size: 150 sq ft
Typical price range: $225–525
Average Cost: ~$350
Patio
Typical Size: 300 sq ft
Typical price range: $450–$1,050
Average Cost: ~$600
Two-car driveway
Typical Size: 600 sq ft
Typical price range: $900–$2,100
Average Cost: ~$1,200
For larger homes, multi-story access, and heavy algae buildup, the total project cost can reach ~$1,500+.
Penetrating vs. Film-Forming Sealers
Penetrating Sealers — invisible protection
Absorbs into the concrete and reacts below the surface. No change in appearance, no film to wear through, excellent against moisture and freeze-thaw damage. The usual pick for driveways and anywhere you want protection without sheen.
Film-Forming Sealers — finished look plus stain resistance
Cure on the surface in a matte or glossy finish, with strong resistance to oil and stains and a “wet look” many patios wear well. They show wear in high-traffic lanes sooner and get reapplied more often.
Not sure which fits? Send photos; we’ll recommend one based on your surface, traffic, and the look you want in the estimate itself.
Our 4-Step Concrete Sealing Process
Sealer only performs on clean concrete. If the surface isn't freshly washed, we pressure wash it first with the surface-cleaning machine; stubborn oil spots get pre-treated. Then the concrete dries fully before any sealer touches it.
We confirm the sealer type for your surface and finish preference, and mask adjacent surfaces, plants, and anything that shouldn't get sealed.
Even application at the coverage rate the product requires; penetrating sealers worked into the surface, film-forming sealers in uniform coats, non-slip additive mixed in where requested.
We walk the surface with you, tell you exactly how long to keep cars and foot traffic off, and what to expect as it cures.
Why Portland Homeowners Choose Us for Concrete Sealing
Wash and seal in one visit
The same crew that cleans your concrete seals it while the surface is ready, no coordinating two contractors, no sealing over grime.
The right sealer, explained plainly
Penetrating vs. film-forming isn't a mystery upsell; we tell you which fits and why in the estimate.
Honest expectations
Sealing lasts roughly 2–5 years depending on traffic and weather, not forever , and we say so up front.
Same-day online estimates
Google Earth measurement + your photos = an itemized emailed proposal, usually within hours.
Real, verifiable reputation
760+ five-star Google reviews at 5.0, Angie's List Super Service Award winner. Locally owned since 2015, and the team carries about 20 years of combined exterior-cleaning experience.
Monday – Saturday: 8:00am – 6:00pm
Concrete Sealing Across the Portland Metro
We’re based at 650 NE Holladay St in Portland and clean roofs throughout the metro, including Beaverton, Gresham, Happy Valley, Lake Oswego, Milwaukie, Oregon City, Tigard, West Linn, Wilsonville, and Vancouver, WA, plus surrounding areas. Hours: Monday–Saturday, 8 AM–6 PM.
Portland Concrete Sealing Questions, Answered
About $2 per square foot including prep, with most jobs falling between $1.50 and $3.50 per square foot depending on sealer type, surface condition, and access. In practice that’s roughly $300 for a walkway, $600 for a patio, $1,000 for a two-car garage floor, and $1,200 for a two-car driveway. Bundling the wash and seal in one visit costs less than booking separately and you get an exact itemized quote, usually same-day, from Google Earth and your photos.
Washing leaves the surface clean and its pores open ideal for sealer penetration. Wait months and you’re sealing over new grime and regrowth, which shortens the sealer’s life.
Typically 2–5 years before reapplication, depending on traffic, weather exposure, and sealer type. Penetrating sealers generally go longer between coats than film-forming finishes on driveways.
Film-forming sealers can add sheen that’s slicker in rain. We mix in a non-slip additive on request, standard practice for walkways, steps, and pool surrounds. Penetrating sealers don’t change surface texture.
We pressure wash and pre-treat first. Stains that have soaked deep into unsealed concrete may not lift completely; we’ll tell you honestly what will and won’t come out before sealing anything in.
It removes what moss needs; a damp, porous surface to grip. Combined with our moss inhibitor treatment, sealed concrete stays clean far longer than bare concrete.
Sealer needs dry concrete and a dry window to cure, so late spring through early fall is ideal. We schedule sealing around the forecast; another reason the wash+seal single visit works well in summer.
Foot traffic and vehicles need to stay off during cure; the timeframe depends on the product used, and we give you the exact window at the walkthrough before we leave.
Ready To Make A Change?
Get Your Free Concrete Sealing Estimate Today
Send your address and a couple of photos of your siding, and we’ll email an itemized quote: usually the same day, no site visit required. Free estimates, no obligation, satisfaction guaranteed.
Trusted by Portland Homeowners Like You
Offices
Head Office
PDX Roof Cleaning & Pressure Washing LLC
650 NE Holladay St Suite 1600
Portland, OR 97232
Gresham Office
2135 SW Towle AVE,
Gresham, OR 97080
Ready to Restore Your Home’s Curb Appeal?
If you’re tired of overflowing gutters or repeated cleanings, we’ll help you choose a guard that fits your roof edge, debris type, and budget, and then install it properly for Portland weather.
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- Trusted locally in Portland Metro