Ceramic Fiber Insulation Insulation Material Aluminum Silicate Overall Length 12 in Overall Width 8 in Thickness 1 in Maximum Use Temperature 2 300 Degrees F Density 6 lb/cu ft R Value @ 1000F 1.06 Form Roll Flexibility Flexible Standards UL 723 Insulation Width 8 in Pipe Insulation Item Ceramic Fiber Insulation Maximum Continuous Use Temperature 1 922 Degrees F