Sonex® Rondo Sound Baffle

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Sonex® Rondo Sound Baffle


Manufacturer: Pinta Acoustic
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The Sonex® Rondo Sound Baffle offers design versatility and excellent sound absorption across all frequencies—preventing noise build-up that interferes with speech intelligibility. Sonex Rondo® Baffles are made from Willtec® foam, which is Class 1 fire-rated according to ASTM E84 for flame spread and smoke density. Willtec® natural also meets the corner burn test UL 1715.

These Sonex® Rondo Baffles are available in lengths up to 24″ with 6″ or custom diameters. Offered in natural white, grey and a variety of HPC coated colors, Sonex Rondo® Baffles are easy to install vertically or horizontally using wall-to-wall or ceiling mounting options.

Rondo Baffles are great for use in large reception areas, multipurpose rooms, aquatic centers, manufacturing facilities and other large spaces.


  • Vertical or horizontal configurations
  • Design flexibility
  • Exceptional sound absorption across all frequencies
  • Easy installation
  • Class 1 fire-rated

Technical Information for Sonex® Rondo Sound Baffle:

  • Size: 6″ diameter by 24″ length
  • Part Number: SRB-6
  • Material: Open-cell melamine-based foam
  • Finish: Natural Grey, Natural White, HPC Coated Colors
  • Density: 0.5 to 0.7 lbs./cu. ft. (ASTM D3574-77)
  • Fire Rating: Class 1 per ASTM E84
  • Microbial Growth: Passes UL 181, section 11
  • Fungus Resistance Rating: #0 per ASTM G21
  • NRC Per ASTM C423-90a: 0.75
Sound Absorption (Hz)
Sabins per Baffle per ASTM C423-90a (J-Mount)
Sound Absorption (Hz)
per ASTM C423-90a (J-Mount)

Installation Method:

  • Install the included Corkscrew hangers in the field for ceiling-mounted cable installation (cable and cable mounts supplied by others.)
  • Avoid hanging baffles more than 10 feet below the ceiling. Long tethering will cause them to sway in air currents.
  • Baffles can be aligned in the same direction or arranged so that every other baffle is turned 90 degrees.
  • Installation is best done at the end of the 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 Sonex® Rondo Sound Baffle,
call us at 800.782.5742 or contact our sales department.

What is HPC Coating?

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 face of panels only.
    • An edge coating option is available for when the edges of the panel will be exposed.
  • 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.
Are custom HPC colors available?

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 set up fee 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.

Corkscrew Hanger

Corkscrew Hanger

The Corkscrew hanger is hardware for use when installing acoustical melamine foam clouds and baffles for ceiling-mounted cable installation. These are available in two lengths. The shorter 1.5 in long…

Display Hook

Display Hook

These plastic Display Hooks twist easily and quickly onto any standard T-bar ceiling grid system. When used with plastic tie wraps or other hanging hardware, the hooks make for an…

Data Sheet

Data Sheet for Sonex® Rondo Sound Baffle

Installation Guide

Installation Guide for Sonex® Rondo Sound Baffle

LEED Credit Statement

LEED Statement for Sonex® Acoustic Foam

Cleaning Guide

Cleaning Guide for Sonex® Foam

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