Interstate Asphalt of Washington

Service · Sealcoating

Sunscreen and raincoat
for your asphalt.

A fresh sealcoat every 2 to 3 years keeps Seattle driveways and lots from drying out, cracking and losing their black finish to UV, rain and winter salt. We sealcoat residential and commercial asphalt across King, Snohomish and Pierce counties.

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Overview

Sealcoating in the PNW.

Asphalt is a petroleum product, and from the day it's laid the binders start to oxidize. UV dries the top layer out, rain leeches the oils, and Seattle's wet winters force water into every tiny crack. Sealcoating puts a fresh protective layer back on top, restoring the color, sealing hairline cracks, and extending the life of your pavement by years.

What we sealcoat

Residential driveways, commercial parking lots, townhome complexes, HOAs, apartment drive lanes, private roads, and small industrial yards. If it's asphalt and not actively failing, sealcoating is cheap insurance against having to pave again in five years.

How we do it right

A good sealcoat job isn't just "paint it black." We pressure-clean the surface, repair any visible cracks and small holes, remove oil spots with primer, then apply two coats of commercial-grade coal tar or asphalt emulsion sealer by spray and squeegee. Lines get re-striped after cure. We block the area to keep traffic off for 24 to 48 hours depending on weather.

Ballpark pricing

Residential driveway sealcoating typically runs $0.30 to $0.50 per square foot in Seattle. Commercial lots come in lower per-foot on large square footage. Crack-fill and repair work is billed separately if needed. A free walkthrough gets you a real number.

Sealcoating in Washington

Current Offer

$1,000 off
any paving project.

Minimum project size applies. Mention this offer when booking your free estimate.

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FAQs

Common questions
about sealcoating.

Every 2 to 3 years for residential driveways, every 2 years for commercial lots with heavy traffic. The first sealcoat after a new install should wait 6 to 12 months for the mat to fully cure. In the PNW, regular sealcoating matters more than drier climates because of how hard wet winters are on asphalt binders.
April through early October is the window. Surface temps need to be above 55 degrees with no rain forecast for 24 to 48 hours. We watch the forecast closely and schedule around the wet spells.
24 hours for foot traffic, 48 hours before driving on it. Hot, sunny PNW summer days let us sometimes reopen in 24 hours, cool damp days need a full 48 to 72.
Hairline cracks, yes. Anything wider than a pencil needs to be crack-sealed separately before the sealcoat goes on, otherwise water keeps getting underneath. We include crack evaluation on every quote and sell the fix straight, no upsell nonsense.

Ready To Start

Let us quote
your sealcoating project.

Free walkthrough, free written estimate, no pressure to book. Call or send a quick message and we'll take it from there.

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