Serving Idaho, Washington & Surrounding Areas
Asphalt Sealcoating
Valley Sweeping provides professional asphalt sealcoating services across Idaho and Washington. Sealcoating is one of the most cost-effective ways to extend the life of your parking lot or commercial pavement — protecting your investment from UV damage, water penetration, oil spills, and the daily wear-and-tear that breaks asphalt down over time. From small commercial lots to large retail centers and HOA communities, our crews deliver clean, professional sealcoating with the kind of durable finish that keeps your property looking sharp for years.
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Years in Business
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How we Sealcoat
Protect Your Pavement Investment
Sealcoating extends the life of your asphalt by creating a protective barrier against UV rays, water, oil, and the daily wear that breaks down commercial pavement over time. Our crews handle every step of the process — from thorough surface preparation and crack sealing to professional sealant application and final restriping. The result is a clean, dark, like-new finish that protects your investment and reinforces your property's professional appearance. Whether you're maintaining a small lot or coordinating a multi-property portfolio, we deliver durable, dependable sealcoating built to last.
- Big-box Retail
- Shopping Malls
- Grocery Stores
- Schools & Campuses
- Hospitals & Healthcare
- Airports
- Industrial Facilities
- Apartment Complexes
- Restaurants

Surface Cleaning
Thorough cleaning and sweeping of the parking lot to remove all dirt, debris, oil, and loose material before sealant is applied

Crack Sealing & Prep
Filling cracks and addressing minor surface defects to create a smooth, prepared surface that maximizes sealant adhesion and longevity.
Sealant Application
Even, professional application of commercial-grade asphalt sealant using spray or squeegee methods for a uniform, durable finish

Cure & Restripe
Proper drying and curing time before reopening the lot, followed by optional restriping for a complete, like-new appearance.

Common Questions
Sealcoating FAQs
What is asphalt sealcoating?
Sealcoating is the application of a protective coating to asphalt pavement surfaces. It acts as a barrier against UV rays, water, chemicals, and oxidation — the four main factors that break asphalt down over time. A properly applied sealcoat extends the life of your parking lot significantly while restoring that fresh, dark, professional appearance.
How often should a parking lot be sealcoated?
Most commercial parking lots benefit from sealcoating every 2 to 4 years depending on traffic volume, climate, and the condition of the asphalt. Newer asphalt typically gets its first sealcoat 6 to 12 months after installation. Properties in harsher climates or with heavier traffic often require more frequent applications.
How much does sealcoating cost?
Pricing depends on lot size, condition of the existing asphalt, prep work required (crack sealing, cleaning), and whether restriping is included. We provide free quotes based on a site evaluation of your specific property.
Does sealcoating extend the life of my parking lot?
Yes — significantly. Asphalt left unsealed typically needs major repairs or replacement in 12 to 15 years. Regularly sealcoated asphalt can last 25 to 30 years. Sealcoating is one of the most cost-effective property maintenance investments you can make.
How long does sealcoating take to dry?
Most sealcoating projects require 24 to 48 hours of curing time before the lot can be reopened to traffic. Weather conditions affect drying time — cool, damp weather extends cure time, while warm, dry conditions shorten it. We coordinate timing with your business operations to minimize disruption.
What time of year is best for sealcoating?
Sealcoating requires warm, dry weather for proper application and curing. The ideal season runs from late spring through early fall, with summer being the most common scheduling window. We plan projects carefully around weather forecasts to ensure optimal results.
Do you restripe after sealcoating?
Yes. We typically restripe parking lots after the sealcoat has fully cured — usually within 24 to 72 hours of application. Fresh stripes on a fresh sealcoat is what gives parking lots that brand-new appearance. Learn more about our parking lot striping services.
Are there industry standards for asphalt sealcoating?
Yes. Quality sealcoating follows standards established by the asphalt pavement industry. The Asphalt Institute publishes technical guidance for pavement preservation including proper sealcoating practices — and Valley Sweeping follows these industry-standard methods to deliver durable, long-lasting results.
Cities We Serve
- Lewiston
- Moscow
- Orofino
- Kamiah
- Kooskia
- Clarkston
- Pullman
- Colfax
- Palouse
- Asotin
