Soundproofing is any means of reducing the sound pressure with respect to a specified sound source and receptor. There are several basic approaches to reducing sound: increasing the distance between source and receiver, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles, or using active antinoise sound generators.

Two distinct soundproofing problems may need to be considered when designing acoustic treatments - to improve the sound within a room (Seeanechoic chamber), and reduce sound leakage to/from adjacent rooms or outdoors. Acoustic quieting, noise mitigation, and noise control can be used to limit unwanted noise. Soundproofing can suppress unwanted indirect sound waves such as reflections that cause echoes and resonancesthat cause reverberation. Soundproofing can reduce the transmission of unwanted direct sound waves from the source to an involuntary listener through the use of distance and intervening objects in the sound path.


Supreme Sound Performance

Class 1 Fire Rated • Refined Finish • LEED Creditable • Custom Colors • Safe For High Traffic Arenas

Ideal for both historical restorations and modern design trends 

Typical applications include:

  • sanctuaries
  • fellowship halls
  • hotel ballrooms
  • conference areas
  • offices
  • museums 
  • libraries
  • and many more

SonaKrete ensures High-quality installations by hand-picking and licensing only contractors who have proven reputations for outstanding workman-ship with spray acoustic and thermal insulation systems. 

Wohl Diversified Services are the only licensed applicators in New York. 
SonaKrete is available in custom colors allowing your design team the opportunity to be creative with ceilings and walls that contribute to the room’s design theme. Since SonaKrete is a cellulose-based product, that qualifies for LEEDcredits. SonaKrete resists impact and abrasion without cracking or spalling, typical of traditional plaster and cementitious-based materials. SonaKrete provides for a faster application while achieving exceptional acoustical performance and an attractive visual appearance. Thus, it can be installed at a more competitive cost than any plaster system.
We look forward to the opportunity to help you achieve your acoustic performance, aesthetic and budgetary goals. Please do not hesitate to e-mail us at jonathan@wohldiversified.comor give us a call at 1-800-869-WOHL if there is anything we can do to help.


Economical acoustic control with a luxurious finish



Typical installations include:

  • schools
  • churches
  • passenger terminals
  • libraries
  • cafeterias
  • offices
  • hotels
  • condominiums.

Available in White and Artic White. Specially matched colors are also available as a design option.


Customizable Sound and Thermal Control

CUSTOMIZABLE TO YOUR SPECIFIC PROJECT                  REQUIREMENTS INCLUDING:                                     


In addition, it usually provides these features at lower installed prices than many common systems such as rigid board and batt insulations, sprayed plasters, and acoustical ceilings. 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.

A Total System: Fiber, Binder, Application

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 to add resistance to fire, mold and mildew. 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 6 standard colors, special color matching is available.

Naturally Tough - Naturally Attractive

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 six standard colors, K-13 can also be specified in specially matched custom colors.

Thermal Performance

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.

Condensation Control

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.

Acoustical Performance

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.