Robert Boyer - Asphalt Institute - says:

"Using a rejuvenator on new construction does not seem to be logical at first glance. However, it has been established that the greatest change in composition of an asphalt binder takes place during the manufacture of the hot mix asphalt (HMA). Applying a rejuvenator to a new surface a few weeks after it has been laid does several things to the pavement. Besides restoring the original asphalt properties that were lost in the HMA manufacture, the chemical assists in sealing the pavement as well as in improving the durability of the surface course."

Read the full report "Ashphalt Rejunvenators: Fact or Fable" presented at the Transportation Systems 2000 (TS2K) Workshop in San Antonio, Texas here with the quote above found on page 10.