
Open Ceiling Sound Control Spray
CSI: 09 81 29 • 09 83 16
Acoustical Finish System
SonaSpray "fc" begins with uniquely prepared cellulose fibers combined with natural fire retardants in a strict, quality-controlled manufacturing process producing a Class A, Class 1 rated material.
SonaSpray "fc" is then applied from 1/2" up to 1" thick by an international network of professional contractors licensed by ICC. During application, the SonaSpray "fc" fibers combine with a water-based adhesive producing a durable exposed finish with exceptionally high bond and compression strength.





Sound Control
Offering a more refined finish, SonaSpray "fc" is the ideal solution for noisy environments where aesthetics and performance are key. A typical installation of 1/2″ thick on solid backing can reduce excessive noise by 65%.
This superior acoustical performance is measured using the room reverberation method per ASTM C 423 to calculate a noise reduction coefficient (NRC). SonaSpray "fc" significantly reduces reverberation time to improve ambient sound quality and speech intelligibility. Typical projects include gymnasiums, open-plan offices, schools, worship centers, restaurants, and hotels.
ASTM C 423 - Sound Absorption (NRC)
SonaSpray "fc" on Solid Backing
Inches | 125 Hz | 250 Hz | 500 Hz | 1,000 Hz | 2,000 Hz | 4,000 Hz | NRC |
---|---|---|---|---|---|---|---|
.5” | 0.00 | 0.14 | 0.49 | 0.87 | 1.00 | 0.99 | 0.65 |
.75” | 0.10 | 0.23 | 0.70 | 0.98 | 1.01 | 0.96 | 0.75 |
1” | 0.05 | 0.40 | 0.94 | 1.04 | 0.97 | 0.99 | 0.85 |
SonaSpray ”fc” on 1.5” Metal Deck
Inches | 125 Hz | 250 Hz | 500 Hz | 1,000 Hz | 2,000 Hz | 4,000 Hz | NRC |
---|---|---|---|---|---|---|---|
.75” | 0.17 | 0.58 | 0.91 | 0.89 | 0.87 | 0.84 | 0.80 |
1" | 0.22 | 0.62 | 1.02 | 1.09 | 1.05 | 1.00 | 0.95 |
SonaSpray ”fc” on 3” Metal Deck
Inches | 125 Hz | 250 Hz | 500 Hz | 1,000 Hz | 2,000 Hz | 4,000 Hz | NRC |
---|---|---|---|---|---|---|---|
.5” | 0.51 | 0.48 | 0.80 | 0.88 | 1.00 | 1.00 | 0.80 |
.75” | 0.55 | 0.55 | 0.94 | 1.01 | 1.03 | 1.00 | 0.90 |
1" | 0.63 | 0.73 | 1.08 | 1.04 | 1.01 | 1.00 | 0.95 |
Custom Colors Available
SonaSpray “fc” is available in four standard colors can also be specified in specially matched custom colors.
Please contact us for more information on customizing your SonaSpray "fc" application.
SonaSpray "fc" Standard Color Chart

Note: Color selection will affect the final price.
Sustainability
SonaSpray "fc" is UL GREENGUARD Gold certified and compliant with LEED v4: Low-Emitting Materials, CDHP/ California Section 01350, SCAQMD Rule 1168, and CHPS- Acoustical Ceiling. Additionally, SonaSpray "fc" provides high light-reflectivity, superior acoustical performance, and may contribute to sustainable credit categories for green-building initiatives.SonaSpray "fc" does not contain silica dust, asbestos, mineral or glass fibers, or PCB’s. Talk to an Expert
Technical Data
Durability
In projects requiring additional durability, SonaSpray “fc” Dura-K may be specified to result in even greater bond and compressive strength without reducing the acoustical performance.
Substrate Compatibility
Surfaces to receive SonaSpray "fc" are to be inspected prior to installation to determine if pretreatment is required.
Typical Projects
SonaSpray “fc” is typically used as an exposed ceiling finish to reduce excessive noise and reverberation and provide versatile color options. It is appropriate for interior spaces such as gymnasiums, open-plan offices, schools, worship centers, restaurants, and hotels.
Please see our Projects Gallery for more examples of how SonaSpray "fc" can be customized to meet your project requirements.