FSK (Foil Scrim Kraft) Aluminum Foil insulation is a flame-retardant material and vapour- barrier. It is a very popular material that is widely used in the insulation sector. Its facing is made of a thin light-weight aluminum foil that is layered against a fiberglass scrim and then bonded to a final layer of natural brown Kraft paper. It is also good for radiant barrier applications. 1.2m / 1.22m width 300 mtrs roll, 115 GSM. Other widths are also possible subject to qty. FSK Aluminum Foil is used in the manufacture of insulated sandwich panels also.