From 1994 to 2004, the Pavement Coatings Technology Center at the Department of Civil & Environmental Engineering, University of Nevada – Reno conducted field studies. Industry used results of these studies to develop standards and develop application recommendations.
One study asked the question, how soon after laying down fresh asphalt pavement should it be sealed? Results of the study is described in an information sheet posted here.
The recommendation resulting from the study is shown in the following quote:
Therefore, the final PCTC recommendation is as follows: “under normal traffic and environmental conditions, a new pavement can be sealed after either: a) one year of normal weather conditions, or b) 90 – 180 days +70 degrees Farenheit weather.”