... flame-retardant adhesive, the third layer is fiberglass cloth.foil insulation NameDFC- 1001ASizeWidth: ≤1300mm;Length: ≤200mLead Time30 Days/20'FCLPackageEach roll ... one layer of fiberglass reinforcement,suitable for roof and wall insulation of house,warehouse,cold storage,factory. This kind of facing ... vapor barrier keeping your cavity from condensation and corrosion . foil insulation