https://insulationwholesale.co.uk/polythene-vapour-control-layer-500g-4m-x-50m-green/
Polythene Vapour Control Layer 500g 4m x 50m Green | Insulation Wholesale
125mu (500 gauge) VCL 4m x 50m is a medium specification, blown polythene material, suitable for use as a vapour control layer within the walls of timber frame...
vapour control layerpolythene
https://source.thenbs.com/en/literature/novia-vc4000-fr-reflective-air-leakage-and-vapour-control-layer/giwWEm5CwLLXDBkDacZtQ8/giwWEm5CwLLXDBkDacZtQ8
Novia VC4000 FR Reflective Air Leakage and Vapour Control Layer | Novia Ltd | NBS Source
Novia VC4000 FR Reflective is a flame resistant and reflective airtight vapour control membrane. Designed for use as a high performance vapour control layer...
reflective air leakagevapour control layer