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



Celbar is a blend of specially prepared cellulose fibers, organic in nature, treated with adhesive and fire resistant chemicals. When sprayed in place, the interlocking fibers result in a mass that produces excellent sound and thermal properties.

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Celbar is pneumatically spray-applied in wall and floor/ceiling cavities to form a monolithic coating. This process seals cracks and holes in the wallboard, around plumbing and electrical outlets, vent ducts and other irregularities. There are no compressed areas or voids to allow sound leaks, R-value reduction, or air infiltration.


Heat moves into, out of and through your home in four ways: by conduction (which R-Value measures), and by convection, radiation and air infiltration (none of which R-Value measures). A superior insulation system will have a high R-Value (prevent heat transfer via conduction), will be pneumatically or spray applied, fully filling the building cavity (preventing heat loss via convection), and will be densely packed (preventing heat loss via air infiltration and radiation). Celbar Cellulose insulation meets all four of these critical performance criteria! By comparison, the most widely used insulation material, conventional fiberglass batts, only helps prevent conduction.


Properly insulating and air sealing the building is one of the quickest, easiest, most cost effective steps you can take to immediately reduce your heating and cooling bills. Studies show that heating and cooling costs are a major component of the building’s monthly utilities.


Celbar has always been formulated with Borates and is free of all ammonia additives. Borates are a highly effective fire retardant. This is important for both residential and commercial insulation. Celbar Cellulose also meets all Federal regulations and ASTM standards for fire safety, in accordance with UL 723 and ASTM C-739-11 characteristics.

Celbar wall insulation provides superior sound transfer control demanded by building designers, owners and occupants in residential and commercial insulation. Celbar assemblies perform closer to lab tested STC ratings in the field than do other conventional batt and sound board systems. This is due to the complete coverage and the sealing action of Celbar.



Celbar’s R-value of 3.8 per inch allows you to design exterior wall systems with higher total R-values. However, R-value alone is not the only measure of a product’s thermal effectiveness. To obtaian maximum thermal efficiency, air infiltration must be miniized. Sprayed in place, Celbar conforms to any substrate, around pipes, obstructions, and over cracks, reducing aair infiltration and forming a highly efficient and effective thermal barrier. It can be sprayed to virtually and exterior stud or furred cavity, and in most cases the wall can be closed up the same day.

In a series of tests, five identical buildings were monitored for KWH usage over an eleven-month period. One building utilized sprayed cellulose in the walls, and the other four utilized fiberglass batt insulation. Upon conclusion, the cellulose-insulated building saved 32% of the KWH usage of the other buildings.

Cellulose fibers are treated with all natural fire retardants, giving cellulose wall assembly an effective 1-hour fire rating.

Cellulose also meets all Federal regulations and ASTM standards for fire safety, in accordance with UL 723 and ASTM C-739-05b characteristics.

Insulation Type Flame Spread Smoke Developed
Celbar Fire Resistant Insulation 15 0
Fiberglass 0-5 <50
Open Cell Foam 25 <450

Celbar Testing

Underwriters Laboratories

R&D Services

Smoldering Combustion Test Report: Passed

Corrosiveness Test Report: Passed

Moisture Vapor Absorption Test Report: Passed

Test Report for Resistance to the Growth of Fungi: Passed

Odor Emission Test Report: Passed



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