"In the late 1970s, the use of coal-tar based sealant was discouraged in favor of fiber-filled, asphalt based sealant," he recounts. "Since fiber clogged up the spray tips, contractors opted for ...

These sealants are made by Maxwell Products, watch the video to see how they are used. Produced by Leon Siciliano More from UK Cracks in roads are caused by natural movement and heat changes.