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ME501 VV
Duo Window Membrane HD

ME501 VV is a high strength, tear resistant window membrane.


For interior and exterior use

ME501 VV provides a high performance internal and external seal to the perimeter joints between the window/curtain wall and the construction.

Due to the intelligent, variable vapour permeability (sd value), complies with ‘inside tighter than outside principles’. The full self-adhesive backing provides a quick and robust method of adhesion to window and construction substrates.

Ideally used as an external weather tight seal in conjunction with ME508 Duo Membrane EW/F as an internal airtight seal.

  • Quick and easy application with high performance ‘next generation’ waterproof acrylic adhesive strips with split release liner
  • Cold/winter weather application easier (with use of primer)
  • Requires minimal or no ‘wet’ adhesive
  • Minimises wastage
  • Instantly weatherproof up to 600 Pa and airtight to Passiv Haus standard (600 Pa)
  • High-performance adhesive is compatible with most common building substrates (please contact an illbruck representative for more information or technical advice)
  • Reduction in application risk especially around corner detailing etc. and from other trades penetrating the membrane post-application - reducing the cost of potential remedial works whilst being easy to repair if necessary.
  • Intelligent moisture management through variable sd value - ideally installed in conjunction with ME508 Duo Membrane EW/F to facilitate drying out of wall build-up.
  • UV stable – will tolerate up to 12 months’ direct exposure prior to covering.
  • Fully compatible with illbruck Building Protection Membranes.


The membrane can be applied before or after window installation to suit on-site details and programming and is an ideal product as a weathertight/airtight membrane for domestic and commercial applications. The fully self-adhesive backing (with split release liner) provides a strong and reliable adhesion to most construction substrates and the window, whilst the durable fleece covering protects the membrane from weather and mechanical stress and with less onerous COSHH implications due to no requirement for solvent-based adhesives.

The product meets the recommendations of the RAL Quality Assurance Association for windows and doors. Successfully tested by MPA Hannover to EN1026 (airtightness) and EN1027 (weather tightness). The self-adhesive strips provide a flexible application methodology and will bond to most common substrates. Microscopic adhesive spheres across the adhesive strip make initial repositioning possible, with high bond strength developing over time.

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