Sika® Sigunit®-39 AF

Sika® Sigunit®-39 AF is an alkali-free setting accelerator for dry-mix shotcrete in
powder form.

The benefits of Sigunit®-39 AF include, but are not limited to the following:

  • Fast cement setting
  • High early strenght development of shotcrete
  • Lower rebound during application
  • Improved bond of shotcrete to rock and concrete, making overhead spraying easier
  • Minimum strenght loss in the accelerated concrete
  • Sigunit®-39 AF is non corrosive to steel reinforcement
  • Alkali-free, which eliminates any adverse effects from additional alkali in the spray dust
  • No additional surface and ground water pollution by leached-out alkali