Tack Coat is a spray applied emulsion which provides a thin adhesive film of asphalt between existing road pavement and a new surfacing layer.

This layer of “Tack” reduces the risk of slippage between the layers of pavement and allows stresses to be distributed uniformly throughout the layers. Tack coats are especially necessary for thin and ultra-thin hot mix overlays. Most Tack Coats can be applied both ambient and elevated temperatures. Dilution with water for easier applications is also a common practice.

Seal Coats are constructed using a variety of asphalt emulsions and cover aggregate combinations to produce a surface for varying traffic loads. With a solid base, a well-constructed Seal Coat increases the life cycle of the road, enabling the asset owner to further benefit from a low cost alternative to other wearing surfaces. To significantly reduce maintenance costs of a roadway, double seals can provide public and private sectors with an effective product capable of lasting up to 10 years.


Issues Addressed

  • Debonding
  • Slipping
  • Shoving
  • Rutting
  • Delamination


  • Helps create a monolithic structure
  • Significantly reduces delamination
  • Improves fatigue life
  • Reduces rutting and shoving
  • Facilitates better compaction

Common Combinations

Tack Coat is incorporated in nearly all new road construction and may be combined with many other treatments.


Western Asphalt Products have a variety of applications

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