
There are typically three types of sealer that are commonly used in today’s industry. These are Coal-Tar, Asphalt Emulsion, and blends of the two. Coal-Tar is considered a superior product that not only slows down the oxidation process, but also protects against oil and gas spillage. We use only Sealmaster's Premium Polymer-Modified Coal-Tar Sealer (PMCTS).
Coal-tar sealcoating protects the surface of the asphalt from the elements that cause oxidation by providing a thin film of coal tar on top of the asphalt surface. Coal tar sealer helps protect against water from penetrating under the surface of the pavement by sealing the small cracks that often appear on the surface of asphalt. It also protects against oil and gas leakage which typically cause havoc in the head-ends of parking spaces. Sealcoating has the added advantage of bringing back a dark black finish of the asphalt that helps to make the asphalt appear new again.
The lifespan of a sealcoat application can vary greatly depending on several factors, such as quality of material, application method, condition of the asphalt, amount and type of traffic on the sealed area, and among other factors. However, a rule of thumb is that the sealcoat should last from two (2) to four (4) years. The typical guideline is to begin a sealcoat regimen sometime during the second year after new asphalt has been laid and repeat the sealcoat application every 2 to 4 years.