Adding protection and curb appeal to your investment.
Adding a protective seal coat improves appearance, protects from water and oxidation, and gives you a fresh clean surface. Seal coating can be done in many different forms and applications ranging from chip sealing, cold sealing, emulsion sealing or rejuvenating. Allied is one of the few companies with the technology to offer all varieties of seal coat applications. One of our experts can help you determine which application is right for your asphalt.
If a complete reconstruct or mill and overlay are not needed for your asphalt surface, consider a seal coat option to maintain your parking lot. There are pros and cons to each seal coating method and our job is to make sure you understand your options and the benefits. See our resource center for educational videos on the various seal coating processes, or get in touch with our staff about your questions and challenges. We’re here to help you make the right choice for your project.
Types of seal coating:
- Fog Sealing – Hot applied emulsion seal coat without aggregate or fillers. Typically used over the top of a chip seal to increase aggregate retention and strengthen the longevity of a chip seal (Treatment Last 1 to 2 years).
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- PROCESS:
- Clean asphalt with compressed air or mechanical sweeper (if asphalt has excess silty sand/clay additional cleaning means may be required).
- Apply emulsion material with a computerized rate of control distributor.
- Let material dry/cure (Typically 1 to 2 hours, but longer in shaded areas or during higher humidity)
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- Seal Coating – An emulsion seal coat, cold applied, with mineral fillers giving a thicker coat and black appearance to the surface. Common application for parking lots, pathways and driveways (Treatment Last 2 to 3 years).
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- PROCESS:
- Clean asphalt with compressed air or mechanical sweeper (if asphalt has excess silty sand/clay additional cleaning means may be required).
- Apply seal coat material.
- Let material dry/cure (Typically 2 to 4 hours, but longer in shaded areas or during higher humidity)
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- Chip Sealing – Hot applied emulsion and aggregate for extended protection and improved skid resistance. Various aggregate types and sizes are available with this process. Typically used on roads, highways, and many types of parking lots (Treatment Last 5 to 7 years).
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- PROCESS:
- Clean asphalt with compressed air or mechanical sweeper (if asphalt has excess silty sand/clay additional cleaning means may be required).
- Apply emulsion material with a computerized rate of control distributor.
- Apply aggregate with a computerized chip spreader (Flaherty) to ensure a proper application rate.
- Roll aggregate into emulsion using an eleven wheeled pneumatic rubber tire roller. 2 to 4 passes are recommended.
- Cleanup: After the surface has properly cured and set, any excess chips are swept from the area. The curing and cleanup phase can vary. State highways and county roads, when using hot polymerized oils, can be swept the day following the application. Highly traveled municipal arterial streets can be swept within a couple of days of application. Residential streets are swept a few weeks following application, and parking lots are typically swept four to eight weeks following the chip seal process.
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- Cape Sealing – Typically a chip seal application combined with a seal coat application over the top. Best overall application for longevity of the asphalt surface and functional use of chip seals in a parking lot setting (Treatment Last 6 to 10 years).
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- PROCESS:
- Consists of the chip seal application, followed by the seal coat or slurry seal application.
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- Slurry Sealing – Emulsion seal coat with fillers, additives and a heavier sand load than typical seal coats (Treatment Last 3 to 5 years).
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- PROCESS:
- Similar to the seal coat process, however, the slurry seal is applied in two coats, with the first coat being heavier and spread with a squeegee, and the second coat is sprayed on.
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- Rejuvenating Seal Coat – This seal coat process has asphalt softening properties that help keep the asphalt surface pliable. Typically, rejuvenating seal coats dry clear, allowing for asphalt maintenance to take place, and avoiding tracking or the need to restripe (not always the case).
- Scrub Sealing – Similar to a chip seal application, but the asphalt emulsion is applied much heavier and spread along the asphalt with specially designed brushes to push the emulsion into the cracks and porous surface. This process has a typical cure time of 4-6 hours. (Treatment Last 5 to 7 years).
- Micro Surfacing– A mixture of water, asphalt emulsion, aggregate, concrete and chemical additives to assist in the curing process (Treatment Last 4 to 6 years). The application process is similar to a chip seal.
