International Cellulose offers a complete line of spray on thermal acoustical finishes that fill a variety of needs. All products combine cellulose fiber mixed with an acrylic adhesive. All fiber is treated with a boric acid and borate fire retardant.

K-13 comes in five standard colors and is available in custom colors. This product provides an R-value of 3.8 per inch as well as providing an excellent solution to reverberant noise problems. The product can be installed up to 5 inches thick. Low frequency noises require thicker applications.
K-13 FC Sona Spray is similar to K-13 but is made from a higher grade of paper that is ground much finer to provide a smoother architectural finish. It comes in regular white, arctic white and is also available in custom matched colors. Typical thickness is %" to 1". Primary use is as an acoustical treatment where a smooth finish is required. Excellent for mid to high frequency noise.
K-13 Urek is very similar to K-13 but has been tested and approved to provide the required delay of ignition and reduction of surface burning rate of low melting, combustible rigid spray-on poly urethane foam. K-13 Urek also adds thermal and acoustical benefit to the foam insulation system.
K-13 Specifications. Download PDF...
To learn more about K-13 products visit www.internationalcellulose.com/home/products/k-13/.