Seal Coating

Asphalt Process

Seal coating is a process of distributing emulsified asphalt on the street surface and then covering it with small rock chips. The excess rock is swept up and the seal coat provides the street with a new waterproof surface and uniform look. Prior to seal coating, the city cleans and fills potholes and cracks, and thoroughly sweeps the streets. Consequently, seal coating does not add strength to the street; therefore, it is not used on older streets that need other types of repair such as overlaying or total reconstruction.