Double Sided Cool Shield Insulation Bubble Foil Product Description The Bubble foil insulation is an efficient and environmental heat insulation material, constructing of aluminum foil or metalized film and bubble layer. It is generally covered by aluminum foil or metalized film and bubble foil, the differences is the number of bubble layer. The weight and construction of the bubble foil insulation can be customized according to the requirement of customers. The high reflectivity and low emissivity of the bubble foil insulation can reduce heat from passing through it substantially. The bubble foil insulation not just works well to reflect radiant heat, but it also works as a moisture barrier, which can cause mold. The insulation is commonly used in wooden or metal buildings, car, box, basements, duct wrap, and applications where other insolation is not present.