coat is a thin layer or film of asphalt emulsion which is applied to
promote adhesion between an existing pavement layer and a new layer
bonding between the existing road surface and the new overlay is
critical in order to assure that the completed pavement results in a
system capable of withstanding traffic and environmental loads.
York State, tack coat material, and its application, must conform to
the requirements of Section 407 of the New York State Department of
Transportation Standard Specifications.
maintains a number of asphalt “distributors”, tank trucks which are specially designed in accordance with Section 407-3.01 for the application of tack coat. Omitting tack coat can result in delamination, fatigue cracking, potholes, rutting and other stresses which reduce pavement life and may lead to total pavement failure.