We use federal spec. oil-jacketed non-tracking material. Open cracks permit water, salt, fuel, oil and sunlight to permeate asphalt and erode its base unless repaired with proper materials. This procedure consists of filling cracks with low (1/8 inch) movement in order to stop moisture from penetrating to the subbase of the pavement. If moisture is not checked, catastrophic pavement failure such as potholes will form. Another reason for crack filling is to stop crack raveling. Crack filling is a very cost-effective method of pavement repair that will add years to its life. Crack fill pavements that are in fair to poor condition on a regular basis to maintain or slightly improve their condition. A life of 6 to 8 years can be expected in most instances. We always clean and route cracks before applying crack filler. We also clean and repair the entire surface. This ensures quality and life to each job.