INSTAABOX is made from stretchable PE, which is vapor retarding and can be used where there is no space (service cavity) between the airtight layer and the interior finish (sheetrock). It provides and airtight cavity in which you can install light switches and electrical outlets. Cables, BX and wires (max ¾”/20mm) can be guided through punched holes (size hole to app. 60% of cable size) in the box. The flexible material of the box will air-seal the penetration permanently airtight. Since the box is made out of a single homogeneous material, one can make penetrations at any point of the box. It’s class III vapor retarding properties protect the insulation against vapor drive, while allowing inward drying in the summer.