Sealcoating refers to the process of applying a protective coating to asphalt-based pavements to protect them from damage caused by UV rays, water, and chemicals. This process involves the application of a thin layer of sealant material over the surface of the pavement. The sealant material used in sealcoating is typically a coal tar or asphalt-based emulsion that is mixed with water, silica sand, polymers, and other additives.

The primary purpose of sealcoating is to extend the life of asphalt-based pavements by protecting them from damage caused by exposure to the elements. Sealcoating also helps to prevent oxidation and raveling, which can cause the pavement to deteriorate over time. Additionally, sealcoating can improve the appearance of the pavement by giving it a fresh, black finish.