Thermal Bubble Factory Making Fire retardend 15 Year warranty Thermal Bubble Backed Double Sided Foil reflective insulation has one layer of 4mm barrier bubble film laminated between two layers of pure aluminium film. Thermal Bubble foil may be used as a vapour retardant and when reflectivity and R-factors are required. Thermal Bubble foil can be stapled, glued or taped if necessary, depending on the installation involved. Our Single Layer Bubble Double sided pure aluminium bubble foil Insulation Material are made of one Layer low heat conductivity Bubble film sandwiched between two low emissivity aluminium Foil. Aluminium foil + Bubble +Aluminium Foil