Illbruck is proud to launch the ME007 FR Window & Door Sealing Membrane +, the first product in a new range of + Class B membranes designed to meet the evolving needs of modern construction. Thanks to advanced coating developments and fleece technology, this cutting-edge solution delivers exceptional performance in extreme weather conditions while ensuring durability, airtightness, and fire safety.
Built for Today’s Climate Challenges
With climate change driving increasingly hotter, wetter, and colder conditions throughout the year, building materials must now offer higher resilience than ever before. Illbruck’s new + membranes have been engineered to outperform industry standards, ensuring structures remain protected against the elements, even in the most exposed locations.
Key Benefits of ME007 FR Window & Door Sealing Membrane +
Outstanding Watertightness & Wind Resistance
Exceeding W1 industry standards, ME007 provides superior protection against wind-driven rain and harsh environmental conditions, ensuring building integrity in even the most challenging climates. When tested around a window in a key BBA test, ME007 membrane resisted the passage of water at 2400pa. This is equivalent to rain battering the membrane at 130mph!
Superior Airtightness for Energy Efficiency
Designed with low energy and Passivhaus standards in mind, ME007 achieves excellent airtightness down to <0.01 m2/m2.h.50Pa, helping reduce energy loss and improve thermal performance.
Advanced Breathability
The membrane conforms to our principles of ‘inside tighter than outside’ allowing moisture within the building to escape, preventing mould and mildew formation while maintaining an optimal indoor environment and protecting the investment of the Window or door it is sealing.
Unmatched UV Resistance & Open Façade Suitability
ME007 offers long-lasting UV resistance and can be left exposed on the building site for 12 months.
True Class B Fire Performance
Tested both in isolation and as a complete system (including overlaps, adhesive, and primer), ME007 is fully complaint with EN 13501-1, ensuring total fire safety assurance for high-rise and “relevant” buildings.
Durability for Construction Sites
Engineered to withstand general knocks and impacts, ME007 is designed for demanding construction environments while remaining easy to cut, fold, and apply.
Ideal for board-to-Slab Edge Details
ME007 is particularly well-suited for sealing board-to-slab edge connections, a critical junction where airtightness and weather resistance are paramount.
Available in 50m rolls with pre-cut slit widths from 60mm to 100mm, ME007 is versatile and easy to install. When used in conjunction with illbruck FR Membrane adhesive (SP025), it forms a robust, continuous weather and airtight barrier across the building envelope, ensuring long-lasting protection around windows, door, junctions and penetrations.
The ME007 FR Window & Door Sealing Membrane + marks the beginning of illbruck’s next generation + membrane range, offering unparalleled performance in airtightness, watertightness, fire safety, and UB resistance. As the industry adapts to harsher climates and stricter building regulations, illbruck continues to lead the way with solutions that enhance both building performance and sustainability.

