Insulation Sheet Insulation Material EPDM Insulation Color Black Overall Length 75 ft Overall Width 4 ft Thickness 1/2 in Minimum Operating Temperature -22 Degrees F Backing Type Plain Maximum Operating Temperature 248 Degrees F Facing Material Unfaced R Value 2.2 Form Roll Flame Spread Index 25 Smoke Developed Index 50 Foam Cell Type Closed Plenum Rating Plenum Rated Flexibility Flexible