Patching is a common asphalt repair on areas of pavement with potholes. Potholes occur when water seeps into pavement through unsealed or improperly sealed cracks. When the water freezes, it expands and enlarges the crack. When the ice under the pavement melts, a void is left. Surrounding pavement falls into the void and forms a pothole.
Asphalt Repair Procedure
Mill the area to achieve a consistent depth and a perpendicular edge