Seal Pavement Cracks Before an Asphalt Overlay? - LinkedIn- seal the Asphalt pavement crack ,In conclusion, sealing pavement cracks is a standard component of a successful pavement maintenance program. Regardless of how efficient an asphalt overlay is done, crack sealing …Why Does Asphalt Pavement Crack?(REMEDY: Mill the asphalt to a depth of 2"and power sweep the milled asphalt to check for cracks. If no crack exist, install a 2" asphalt overlay followed by a preventative maintenance plan (Seal coating Year 2 and then every 3 years there after).