Sealcoating generally consists of a mixture of asphalt, water, mineral fillers, and various other admixtures. Sealcoats are applied directly to the surface of an asphalt pavement. They can be applied by rubber squeegee, broom or mechanical spray.
Sealcoats serve 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, air and traffic. Sealcoats also aesthetically enhance the pavement by providing a smooth, black, even surface ideal for striping and cleaning. Sealcoats are designed for off highway use where there are low traffic speeds and tight turning radiuses such as residential streets, parking lots, mobile home parks, schools, shoulders, etc.