Data Sheet Data Sheet for Whisperwave® Ribbon Acoustic Foam
Installation Guide Installation Guide for Acoustic Foam Panels
Cleaning Guide Acoustic Foam Cleaning Guide
LEED Statement Sonex® Acoustic Foam LEED Statement
  1. What is HPC Coating?
  2. HPC is a high-performance coating that is applied to acoustical melamine foam base. Our exclusive water based HPC formulation improves durability and protects the acoustical foam from dust and dirt, allowing the surface to be cleaned using a damp cloth. The HPC coating is especially appropriate for use high-traffic areas. HPC Premium extends the HPC coating further by offering a line of brilliant colors from which to choose.

    • HPC Coating for Wall and Ceiling Panels:
      • Coating is applied to the panel face and edges.
    • HPC Coating for Hanging Baffles and Clouds:
      • The coating will be applied to all exposed edges and sides.
    • HPC Coating for Drop-In Ceiling Tiles:
      • All necessary edges will be coated to provide a finished appearance.
  3. Are custom HPC colors available?
  4. Custom HPC colors are available. Popular paint brands may be combined with our exclusive HPC formulation to produce unique designs for any project.

    To produce an order for custom HPC colors, please be aware of the following.

    • There is a minimum requirement of 700 square feet of Sonex® Acoustical Foam.
    • We require the brand name, paint color and number.
    • There is a setup fee is for each custom color.
    • We require a deposit for the order.

    Customers with an order for custom HPC colors will receive a sample to approve prior to producing the order.

Whisperwave® Ribbon Acoustic Foam


Size: 1' x 4'
Thickness: 2"
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Our Whisperwave® Ribbon Acoustic Foam allows you to create unique designs for direct mount wall and ceiling applications. Based on the same pattern as the Whisperwave® Ribbon Sound Baffle, this acoustical panel allows you to create remarkable architectural features while absorbing echo and sound.

Create a better sounding and visually captivating environment. Whisperwave® Ribbon Acoustic Foam Panels are available in natural melamine foam colors (natural white, natural grey) and HPC coated colors. These panels can easily be mounted to any wall or ceiling surface with a water-based construction adhesive.


  • Reduces echo and reverberation
  • Improves speech intelligibility
  • Exceptional acoustical performance
  • Mold-resistant, fire-retardant

Technical Information for Whisperwave® Ribbon Acoustic Foam:

  • Size: 1′ x 4′ (16 sheets per box)
  • Thickness: 2″
  • Coverage: 64 square feet per box
  • Material: Open-cell melamine-based foam
  • Intended Use: Surface mount wall or ceiling panel used to reduce echo and reverberation.
  • Pattern: Wave
  • Finish: Natural Grey, Natural White, HPC Coated
  • Density: 0.5 to 0.7 lbs./cu. ft. (ASTM D3574-77)
  • Fire Rating: Class 1 or A per ASTM E84
  • Microbial Growth: Passes UL 181, section 11
  • Fungus Resistance Rating: #0 per ASTM G21
  • NRC Per ASTM C423-90a
    • Natural Grey / White: 0.80
    • HPC Coated Colors: 0.95
Sound Absorption (Hz) ASTM C423-90a
Natural Grey / White0.050.310.811.010.990.950.80
HPC Coated0.130.411.

Installation Method:

  • Easily mount these panels to any wall or ceiling surface with water-based construction adhesive.
  • For best results, install this product at the end of your construction project.
  • Use clean gloves to prevent soiling material.
  • Melamine foam is fragile, please handle with care.
  • Do not install material of unacceptable quality.

For more information on our Whisperwave® Ribbon Acoustic Foam,
call us at 800.782.5742 or contact our sales department.