Description
Vapour barrier. 2 1/8 in. Vapour barriers are recommended to avoid moisture and cold air infiltration through the box, when installed on outside walls or on ceilings leading to the attic. For octagonal boxes.
Transparent material makes installation easy and safe
Apply caulking against the back of the wall before installation
To prevent air infiltration and condensation
Weather resistant material which can be used without cracking at extreme cold temperatures