If sealcoating is so beneficial, why aren roads and highways sealed?
Highways are continuously kneaded by the tires of the high volume traffic. This keeps the pavement lively, pumping the oils in the blacktop to the surface. In many municipalities the roads are sealcoated, using materials like slurry seal or Micro-Pave. The problem with driveways and parking lots is that they do not receive this continuous traffic flow, and are therefore far more vulnerable to the detrimental effects of the environment.
