Seal Coating

Our Services

Seal Coating

Seal coating protects the top of the asphalt, preventing water from penetrating the surface of the pavement and protecting the top layer of asphalt from oxidation and wear caused by exposure to the sun and air.

What is Seal Coating?

Seal coat is a mixture of emulsified asphalt, water, mineral fillers, and various other mixtures. Seal coats are applied directly to the surface of an asphalt pavement. It can be applied by rubber squeegee, broom, or mechanical spray.  Seal coat serves to seal the top of the asphalt, preventing water from penetrating the surface of the pavement and protecting the top layer of asphalt from oxidation and wear caused by exposure to the sun and air.

Seal coat also beautifies the pavement by providing a smooth, black, and even surface ideal for painting lines and sweeping. Seal coat is designed for off-highway use where there are low traffic speeds and tight turning radiuses such as parking lots, mobile home parks, schools, shoulders, etc. Seal coats are different from slurry seals which use a much coarser aggregate filler and are designed for use on high-speed areas with straight rolling traffic.

How Does Seal Coat Help?

Seal coat seals the asphalt pavement, preventing the oxidation and erosion of the top layer of asphalt. On older pavements, seal coating replaces fine particles lost from the asphalt surface due to oxidation. Seal coat seals the small cracks that can turn into large cracks and prevents water from seeping down to the base material seal coat helps protect the asphalt from the sun as well as the harmful effects of chemical spills such as oil and gasoline. Seal coating provides an attractive black surface that is ideal for painting lines and other markers. It also leaves a smooth, clean surface ideal for sweeping, lowering cleaning costs. Seal coat costs pennies per square foot compared to the dollars needed to repair or replace damaged asphalt.

When Should Seal Coating be Done?

Seal coating should be done as soon as possible when the asphalt is new. Seal coating is more of a preventative maintenance for asphalt surfaces. Seal coating should be applied every 3-5 years, this depends on the climate and amount of traffic. This is similar to how someone gets their house painted to keep the weather from deteriorating the wood.

Frequently Asked Questions
What is crack filling?
Crack filling is the process of injecting a hot pour rubberized sealant into isolated cracks in the asphalt pavement to prevent water from penetrating the sub-grade and stone base.
Why crack fill?
Crack filling is the most cost-effective maintenance for your pavement. Cracks in asphalt allow water under the pavement which causes the base to become unstable during the freeze thaw cycle. Unstable base leads to more cracking and eventual pavement failure.
When should a parking lot be crack filled?
Can be done throughout the life cycle of a pavement; however, only isolated cracks should be sealed, never alligatored areas.
What time of year should a parking lot be crack filled?
Crack filling season begins in April and ends in November. Crack filling can be completed in the winter months if it is dry. It is best to crack fill going into the winter months when the cracks in the asphalt are as wide as possible. In the colder month’s cracks expand and in the summer months, cracks contract.
How often should a lot be crack filled?
Since this is a maintenance operation, it can be done as often as needed. Pavements on a yearly maintenance and repair plan should budget for this once a year.
Why can’t alligatored areas be crack filled?
When alligatored areas appear in a parking lot it means that water has penetrated the sub-grade layer and the pavement can no longer support the weight of the traffic. Crack filling is not the solution at this stage.
How long does it take the material to dry?
The Crack filling material is applied at 300° F but cools to the touch in minutes. A black silica sand is broadcasted over fresh crack filler to prevent tracking.
Will the crack filling material track into my buildings?
Each section must be secured prior to the start of work. The material will track if it is walked on or driven on before it has dried. During the hot months crack filler softens. The black silica sand helps tracking.
What is over banding?
Over banding is the process of “squee-geeing ‘V injecting a layer of crack filling material over the prepared crack leaving a two to three-inch band of material.
Will sealcoat material stick to crack sealing material?
The two materials will bond but since the crack sealing material is designed to flex through a wide temperature range, the sealer will chip off from the crack seal. Expect a color difference between the two materials.
We had our pavement crack filled and some of the cracks re opened?
That happens due to the freeze thaw cycles in the winter. Cracks may re open. Crack filler is applied hot and squeegeed tightly into crack. When crack filler cools off it expands. Crack filler is flexible and moves with the winter movement. That is why crack filling is a yearly maintenance.

We’re committed to quality work and customer satisfaction 100% of the time.

Here’s what you can expect working with Statewide Parking Lot Services

  • Top quality workmanship
  • All work is completed in a timely manner
  • All work includes extensive site preparation and care
  • Fully licensed and insured
  • Only state-of-the-art equipment used
  • Experienced, professional staff
  • Customer Satisfaction Guaranteed
I wanted to tell you we are thrilled with the driveway sealing.

It looks great and your crew did a great job.

Please let your guys know we appreciate their attention to detail and their quality work.

HOME DRIVEWAY-SEAL COATING ENUMCLAW, WA
Your company has done a terrific job for me.

Great, reliable, honest people.

COMMERCIAL BELLEVUE, WA
The lot looks like a brand new lot.

Thank you for our new seal coat and striping that you did for us. The lot looks like a brand new lot. The black top looks awesome and the lines are crisp.

SEAL COATING AND STRIPING PROJECT KENT, WA
They saved us tons of time.

I chose Statewide Parking Lot Services to do asphalt grinding on a job that we were paving back ourselves. The grinder sent to my job was a lifesaver. They saved us tons of time and now I want to buy a grinder!

GRINDING PROJECT OLYMPIA, WA
They run a good operation.

I sub out our asphalt work to Statewide. I have known the McGraw’s for years and they run a good operation. I like that they are a local family business.

ASPHALT PROJECT AUBURN, WA
Your crew was amazing!

Thank you for my beautiful new driveway!! Your crew was amazing!

DRIVEWAY PROJECT SEATTLE, WA
I recommend them to everyone.

I have been working with Statewide on my commerical parking lots for 10 years. They always show up on time and do a quality job. I recommend them to everyone.

Commercial Parking Lot Project EVERETT, WA
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