ProctorPassive SmartVap

Air barrier with Variable Dapour Diffusion Resistance

ProctorPassive SmartVap 100 (SmartVap) is a two layer AS4200.1 compliant light duty air barrier and variable vapour diffusion resistance retarder.


When installed as a continuous layer, SmartVap will form an air tight layer, improving the efficacy of ventilation systems and thermal efficiency of the building enclosure. The effective management of air and vapour passage through wall, ceiling and floor assemblies can help protect the building fabric and insulation from condensation and related problems such as mould, timber rot, corrosion and loss of thermal resistance.

SmartVap should not be used on the exterior side of insulation in cold and temperate climates as an alternative to a vapour permeable sarking, where there is a risk that condensation will form on the interior face of the retarder.

Variable vapour diffusion resistance

The functional layer of SmartVap is a polyamide film. Such films passively adjust vapour diffusion resistance depending on the humidity where located. The polyamide absorbs water vapour from the air, opening the molecular pores thus adjusting vapour diffusion resistance according to ambient humidity conditions.


  • Air tight
  • Fire Retardant (FR Index: ≤5)
  • Semi-translucent for ease of installation
  • Variable water vapour diffusion resistance
  • High water resistance
  • Non perforated
  • Non conductive
  • Lightweight and easy to handle
  • AS/NZS 4200.1 testing and compliance
  • Compatible with SabreSeal MS Facade and SabreBond SMP50


Technical Properties

Vapour PermeabilityASTM E96 (Procedure B)0.55 ug/N.s
Vapour ResistanceASTM E96 (Procedure B)1.83 MN.s/g
Air Control ClassificationAS/NZS 4200 (ISO 5636.5)Air Barrier (≥0.1 MN s/m³)
Water BarrierAS/NZS 4201.4High
Tensile Strength MDAS 1301.448MD:2.5kN/m, CD:1.9kN/m
Edge tear ResistanceTAPPI T470MD:134N, CD:104N
FlammabilityAS 1530.2Low (≤5)*
Resistance to Dry and Wet DelaminationAS/NZS 4201.2 AND 4201.3Pass
ShrinkageAS/NZS 4201.3< ±0.5%

Available Sizes


Roll Width1.5m
Roll Lengths30m
Weight per roll5.5kg