Sealing & Waterproofing in Seattle, WA

Penetrating concrete sealers, joint and crack sealants, and exterior waterproofing systems for sidewalks, driveways, and decorative concrete in Seattle, WA.

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Sealing & Waterproofing in Seattle WA

Defend Your Concrete Against Washington's Freeze-Thaw Cycles

Sealing isn't optional in Washington. With regular freeze-thaw cycles and 150+ rain days per year, deicing salt every winter, and humidity all summer, unsealed concrete absorbs water, freezes, and spalls. We apply silane and siloxane penetrating sealers that bond inside the concrete (not just on top), repelling water and salts while letting the slab breathe.

Beyond surface sealing, we also handle joint and crack sealing with polyurea sealants that flex with the slab through every freeze-thaw cycle. For below-grade concrete (basement walls, retaining structures, foundations), we apply membrane and bentonite waterproofing systems. The goal in every case is the same: keep water out of the concrete and out of structural failure pathways. Call us at (206) 555-0182 for a free, written estimate.

When You Need Sealing or Waterproofing

  • New concrete pour ready for first sealer coat
  • Existing concrete with spalling or salt damage
  • Joints that have lost their original caulk
  • Cracks letting water under the slab
  • Stamped or stained concrete needing color enhancement
  • Basement or below-grade concrete with seepage

Sealing & Waterproofing Services

  • Silane/siloxane penetrating sealer (clear, no shine)
  • Solvent-based acrylic sealer (color enhancement)
  • Water-based acrylic sealer (low VOC, no glare)
  • Polyurea joint and crack sealant
  • Below-grade membrane waterproofing
  • Annual sealer inspection and refresh program

Schedule Your Sealing & Waterproofing Project Today.

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Sealing & Waterproofing fresh pour and finish, Seattle project
Saw-cut detail on a sealing & waterproofing job in Seattle, WA
Cured and sealed result of a sealing & waterproofing job, Seattle
Pricing

Sealing & Waterproofing
Pricing in Seattle, WA

Real numbers we use to bid sealing & waterproofing jobs every week. Final quote depends on access, scope, and finish choices.

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Penetrating Sealer (clear)

Flat-rate pricing in Seattle, WA.

Starting at:
$1.25/sq ft
  • Silane/siloxane chemistry
  • No surface film
  • 5–7 year protection
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Acrylic Color-Enhancing Sealer

Flat-rate pricing in Seattle, WA.

Starting at:
$2/sq ft
  • Wet-look color depth
  • UV-stable
  • Stamped/stained surfaces
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Joint & Crack Sealing

Flat-rate pricing in Seattle, WA.

Starting at:
$5/ln ft
  • Polyurea sealant
  • Color-matched
  • Flex through freeze-thaw
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Trust

Why Seattle Sidewalk Pros?

Reliable concrete work, transparent pricing, and crews that finish the way you'd want it on your own house.

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Licensed &
Insured

$2M general liability, workers' comp, and ROW registered.

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Flat-Rate
Pricing

No surprise add-ons or post-quote fees. Written estimates.

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5-Year
Warranty

Workmanship warranty in writing on every pour.

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Local
Crews

W-2 employees from Seattle—no out-of-town subs.

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Code
Compliant

City of Seattle permits and ADA standards on every job.

FAQs

Sealing & Waterproofing
Questions, Answered

Honest answers from a hands-on concrete crew.

Penetrating sealers last 5–7 years on residential walks and driveways. Acrylic sealers on stamped or decorative concrete look best when refreshed every 2–3 years. We can put you on a reminder schedule.

Penetrating sealers (silane/siloxane) don't change appearance—they soak in invisibly. Acrylic sealers add a wet-look color depth that brings out integral color and aggregate. We bring samples so you can see both before deciding.

Penetrating sealer can be applied over old penetrating sealer with no prep. Acrylic over acrylic needs to be cleaned and lightly etched first. Old solvent-based over water-based (or vice versa) usually requires a full strip.

Sealing prevents the worst of it—water absorption and resulting spalling—but no sealer is perfect. We pair sealing with proper drainage and joint maintenance for the best long-term result.

Related

Related Sidewalk Services

Pair your project with these commonly bundled services from Seattle, WA.

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Sealing & Waterproofing.

Free written estimates throughout Seattle, WA and Greater Seattle.
Most replies inside two business hours.

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