Sealing Asphalt Cracks is extremely important because water and oils enter the cracks and penetrates the soil base under the pavement and this will lead to soft spots and this will eventually lead to alligator asphalt and then potholes develop.
Every contractor or property manager should take asphalt crack repair serious because proper maintenance will add years of life to the pavement. Proper preparation of the crack is also critical because new crack filler, regardless if your using hot lance or even cold crack filler, both will adhere much better to a properly cleaned crack, and using a hot air lance is the preferred method by professionals, municipality's, and road repair crews.
