Ceramic Fiber Insulation, Insulation Material Aluminum Silicate, Overall Length 50 in, Overall Width 4 ft, Thickness 2 in, Maximum Use Temperature 2,300 Degrees F, Density 8 lb/cu ft, R Value @ 1000F 0.75, Form Roll, Flexibility Flexible, Standards UL 723, Insulation Width 4 ft, Pipe Insulation Item Ceramic Fiber Insulation, Maximum Continuous Use Temperature 1,922 Degrees F, For Piping System Industrial Process, For Use On Pipe Insulation, Insulation Color White Featuring excellent heat insulation and fire protection, this UNITHERM ceramic fiber insulation has low thermal conductivity, low thermal capacity, and excellent handling strength. The ceramic fiber material is manufactured with pure alumina-silica to form a continuous blanket, mechanically sewed with a double needle in order to p.