INSULATION FELT,THERMAL for FSG 56
A flexible or semirigid material composed of one or more kinds of fiber with an added binder, supplied in flat sheets or rolls. It is designed to offer resistance to the flow of heat, and must be rated for this use. For felted insulation with paper or other sheet material affixed to one or both sides, see INSULATION BLANKET, THERMAL. Excludes FELT SHEET and FELT STRIP.