Asphalt Mastic is used on highways, airports, parking lots & driveways. It is a rubber based material mixed with aggregate. Heated & applied hot. Primary uses are for those large con-caved cracks were crack sealant is no longer any use. Also for depressed areas & small to medium pot holes. This product is designed to be inexpensive & have many years of life in the 4 seasons of the North. Call us with any ?'s.