Seal Coating - Black Tar

Asphalt is composed of three main components, granular, stone dust, and tar. Tar is the product that gives asphalt its elasticity, allowing it to expand and contract along with weather variations. Unfortunately, heat and UV rays cause tar to oxidize, resulting in the asphalt losing its rich black colour. The grey colour indicates a lack of tar in the asphalt; the grayer the asphalt, the less elastic-like and the more brittle it becomes. Asphalt expands and contracts at a similar rate regardless of the lack of tar, resulting in cracking, heaving, dipping, and elevation differences. Rehydrating the surface every one to two years will dramatically increase its lifespan and decrease the chances of cracks and potholes.