The fabrics are treated with a non-toxic flame retardant, which is absorbed into the fibers. The product is non-toxic and biodegradable. At the Thoreau Center, Greenwood Cotton Insulation was installed in acoustical wall partitions, attics, walls, and crawl spaces. Cellulose Insulation Greenstone Industries produces the R-Pro insulation, installed in the Thoreau Center. The loose fill insulation seals around irregular objects, resulting in less air infiltration and greater sound absorption.
Fibers stay uniform and fluffy.
The fire retardant chemicals used are borax, boric acid and ammonium sulfate. Cellulose contains nothing that is considered hazardous, and carries no hazardous warning messages. At the Thoreau Center the cellulose insulation was installed in perimeter walls, crawl spaces and attics.