What are the Precautions for Using HFS?

  • Pavement should be in relatively good condition, with no alligator or map cracking, ravelling, or scaling.
  • Open graded (porous asphalt and concrete) pavement surfaces will no longer function as open graded surfaces after installation.  These surfaces may require a double layer application to ensure adequate thickness of the binder.
  • Pavement surface must be clean and dry for application.  Concrete surfaces should be shotblast prior to application for best adhesion.  All surfaces should be free of oils, grease, and other latency.
  • Resin curing generally produces an exothermic reaction.  Higher temperatures will accelerate curing/hardening, while lower temperatures will slow curing/hardening.  In general, surface temperatures above 50F are required for installation of most resins.
  • Excess aggregate must be thoroughly removed from the new surface prior to opening to traffic.  A power broom or vacuum followed by compressed air is the most effective process.  The new surface will naturally shed aggregate over the first several days, requiring additional sweeping to remove loose stone.
  • Life expectancy is 5-7 years under heavy traffic, 10-15 years for low traffic.