Fi-Foil’s FSK Shield is a single-sided foil facing that is comprised of 0.0003” aluminum foil bonded to 30 lb. natural kraft paper with a flame retardant adhesive and is reinforced with tri-directional fiberglass scrim. FSK Shield is intended for use as an attic, roof, or wall radiant barrier and as a class A insulation facing. The product also can be used as an effective vapor barrier. FSK Shield is available in 1000 square foot rolls 54” wide.