Acoustics & Thermal Insulation

A spray-applied acoustical texture designed to provide an attractive, high performance solution to acoustical and lighting design objectives.

Spray-on systems



K-13 insulation is the spray-applied cellulose insulation tailored to your specific project requirements for insulation (R value), noise reduction (NRC), color, durability, condensation control, texture, and aesthetics. It is applied to virtually any properly prepared surface configuration of wood, steel, concrete, glass and other common construction surfaces. K-13 can be sprayed up to five inches thick overhead in one application without mechanical support. Additionally, K-13 serves as the exposed finish requiring no additional materials.

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K-13 is a total system of recycled natural fibers, chemical treatment, binding system and application method. The K-13 system begins with specially prepared cellulose fibers which are chemically treated. K-13 is produced in a strict, quality controlled manufacturing process. K-13 is applied by an international network of licensed applicators through approved fiber machines and nozzles for control of the fiber/binder ratio. During application, the K-13 fibers are combined with a patented adhesive. The finished product is a strong, durable monolithic coating of a predetermined thickness. Some surfaces will require priming prior to being sprayed. K-13 is available in 7 standard colors, special color matching is available.



Available in a wide variety of colors, K-13 is especially attractive as a surface finish in new construction as well as renovation projects. Available in seven standard colors, K-13 can also be specified in specially matched custom colors.



K-13 insulates by creating dead air spaces between and within its hollow fibers. Because K-13 fibers are sprayed-in-place, they fill cracks, seams and voids, forming a monolithic coating over the substrate which helps reduce air infiltration. Unlike prefabricated insulations, K-13 has no voids or compressed areas to reduce thermal efficiency. The result is a more effective in-place product with exceptionally low heat loss characteristics. The patented adhesive utilized in the installation of K-13 adheres to virtually all common construction materials including: metal, wood, concrete, urethane, styrofoam and glass. Some surfaces may require pretreatment prior to installing K-13. This unique adhesive provides unequaled strength allowing applications of 3/4 inch to over 5 inches without mechanical support. This capability provides R-values from 3 to over 19.



For areas such as indoor pools and ice arenas, K-13 aids in condensation control. The proper combination of K-13 and ventilation prevents condensation on metal, concrete and other surfaces. K-13 actually reduces ventilation requirements, saving in both the ventilation equipment investment and operating cost.



The resilient fibers of K-13 absorb sound energy instead of reflecting it, reducing reverberation time and making speech and music more intelligible. Excessive noise is reduced with the application of K-13 while greatly improving ambient sound quality in a wide variety of building projects including auditoriums, sports facilities, detention facilities, television and sound studios, convention centers and parking garages.

Fire Performance Ratings

K-13 has been rated and approved by Factory Mutual Research Corporation for use in the following categories:

  • Category I: As an interior finish material of low fire hazard (Class I Building Material) over non-combustible surfaces not requiring automatic sprinkler protection in and of itself.
  • Category II: As a protective coating to delay the ignition and reduce the surface burning rate of combustible wood and cellulosic fiber building materials.
  •  Category III: As a protective coating to delay the ignition and reduce the surface burning rate of low melting, combustible cellular plastic building materials and to protect their dimensional stability for a brief period.
  •  Category IV: As a protective coating for building structural steel to supplement automatic sprinkler protection in preventing structural failure temperatures of the steel in high fire hazard occupancies.
  • Category V: As a protective coating to the underside of Class II insulated steel roof deck construction to sufficiently lower the rate of fuel contribution from the Class II deck components to qualify the construction as Class I allowing automatic sprinkler protection to be omitted where permissible under Factory Mutual Standards.

Surface Burning Characteristics:

K-13 has a Class 1, Class A flame spread rating per ASTM E-84, UL- 723, NFPA-255 and UBC-42.

  • Flame Spread- 5
  • Smoke Developed- 5

Underwriter’s Laboratories – Ref. #R5499



  • ASTM-C-518 Thermal Conductivity
  • ASTM E-119 Full Scale Fire Wall Test, including Hose Stream Test
  • ASTM E-84 Surface Burning Characteristics
  • ASTM C-423 Noise Reduction Coefficients
  • ASTM C-523 Light Reflectance
  • ASTM E-736 Bond Strength
  • ASTM E-859 Air Erosion
  • ASTM C-739 Moisture Absorption
  • ASTM E-90 Sound Transmission Loss
  • ASTM E-413 Sound Transmission Loss
  • ASTM E-1042 Acoustical Absorption
  • ASTM C-1149 Spray-applied Cellulose Insulation

Test reports available upon request.



  • Certificate of Conformity
  • BS 476: Part 6 – Fire Propagation Test
  • BS 476: Part 7 – Large Scale Surface Spread of Flame Test
  • Code Approval Underwriter’s Laboratories –UL-ER5499
  • Federal Defense Logistics Agency Cage Code: ONJU2
  • Department of the Navy Guide Specifications – NFGS-07218
  • Core of Engineers Guide Specifications –CE-201.01
  • Federal Specification –SS-S-111C
  • Factory Mutual Research – Report Nos. 19678, 20399, and 24703
  • EPA 40 CFR Part 248
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