ProctorWrap™ Rainscreen (RS-IT) A highly UV stable, vapour permeable wall membrane for open joint rain screen applications


ProctorWrap™ Rainscreen with Integrated Tape (RS-IT) is a two layer membrane consisting of a spun bonded polyester layer with a unique functional coating that offers improved resistance against UV and high temperatures up to 120°C. Developed primarily as a vapour permeable sarking for use in open joint rain screen applications, ProctorWrap RS-IT offers a combination of durability and high water holdout without compromising vapour permeance.


ProctorWrap RS-IT is suitable for installation in vertical wall constructions behind ventilated facades with regularly spaced open joints no greater than 50mm wide accounting for no more than 30% of total surface area.

ProctorWrap RS-IT should be installed with the darker black “rubbery” surface facing outwards.


  • 120 (4 months) UV Exposure
  • High water resistance
  • Suitable for use behind in open joint cladding
  • High UV durability
  • High vapour permeable
  • Air tight
  • Supplied with factory applied integrated tape

Roll Sizes

  • 1500mm x 35.0m (52.5m2)
  • Weight per roll: 16.5kg


Property Standard Value
Vapour Permeability ASTM E96 2.7800 ug/N.s
Vapour Resistance ASTM E96 0.36MN.s/g
Tensile Strength MD AS 1301.448 MD:6.6kN/m, CD:3.7kN/m
Edge tear Resistance TAPPI T470 MD:337N, CD:191N
Thickness EN 1849.2 0.5mm
Flammability AS 1530.2 Low (≤5)*
Water Barrier AS/NZS 4201.4 High
Air Control Classification AS/NZS 4200.1:2017 Air Barrier
Resistance to Dry and Wet Delamination AS/NZS 4201.2 AND 4201.3 Pass
Shrinkage AS/NZS 4201.3 < ±0.5%
UV Stability 4 months (120 days)

*Testing to AS1530.2 has only been conducted on sections of material without integrated tape

Roll Size

Roll Width 1.5m
Roll Lengths 35m
Coverage 52.5m²