UniTherm Ceramic Bulk Fiber (6-8# Densities 2300F) 24L x 18W x 18H 25 lbs (R-Value 56.75) Box for Chimney and Furnace Insulation

Ceramic Bulk Fiber (6-8# Densities, 2300°F) (R-Value 56.75) consists of high quality spun or spun and chopped high temperature fibers made of alumina-silica ceramic, which is naturally chemically inert. Ceramic Bulk Fiber is an optimal material for the production of fiber textiles and custom insulation applications for both commercial and industrial uses, which require either shape forming or filling of intricate spaces. Other applications include fireplace panels, expansion joints, riser sleeves for metal castings, base seals on furnaces, chimney insulation, and many more. Ceramic Bulk Fiber comes packaged in boxes of approximately 25 lbs. of material.