The RH99 HumiGuard Plus formula provides a 30 year warranty against sag, surface growth of mould and mildew when installed in Armstrong Peakform 24mm steel grid, Armstrong Suprafine or Silhouette 15mm steel grid and Armstrong Blue Tongue Aluminium 24mm grid.

Conforms with BCA Spec. C1.10 and tested to AS/NZS 3837:1998 – Group 1, ISO 5660 – Group 1 –S.

  • TOTAL ACOUSTICS™ Performance (NRC + CAC)
    • High sound absorption - NRC 0.70 for reduced reverberation and quieter spaces
    • High sound attenuation - CAC 35, improving room to room privacy
  • Cost effective ceiling solution
  • Reliable, proven performance
  • High light reflective finish
  • RH99 Humidity Resistant
  • Sustainable – Green Star® contribution


  • Armstrong Fine Fissured & Fine Fissured High Acoustic Data Sheet
  • Armstrong Installation & Maintenance
  • Armstrong RH99 Warranty
  • Armstrong Sustainability Brochure
  • Armstrong

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