Class B Fire Rated Window and Door Sealing Membrane + (ME020) is a fully self-adhesive, breathable window sealing membrane with reaction to fire class B-s1,d0. Designed for the rapid installation of window and doors on modern construction projects, ME020 delivers not only durability, airtightness, fire safety, and extreme weather resistance, but with its high breathability and simultaneous water, weather- and airtightness, ME020 is the ideal solution for the high demands placed on window and façade sealing on high-rise buildings.
As the pressure to deliver construction projects on time only increases, high performance products that apply quickly, perform multiple tasks and maintain the highest levels of fire and weather resistance become even more important. The new ME020 meets all these requirements, offering the highest levels of performance and designed for the needs of the modern construction environment.

What is more, this performance does not come with an increased environmental cost. ME020 meets EMICODE® EC1PLUS standard, a certification for building materials, indicating very low emissions and meet the most rigorous air quality standards.
ME020 delivers a Class B fire performance when directly installed over a wide range of A1 or A2-s1, d0 substrates.
Tested to W1+ industry standards, ME020 provides superior protection against wind-driven rain and harsh environmental conditions, ensuring building integrity in even the most challenging climates.
ME020 is used as a self-adhesive external window sealing membrane in façades with increased fire protection requirements. Its self-adhesive properties enable quick and easy installation without any additional adhesive and on almost all substrates.
ME020 offers permanent UV resistance and can be left exposed on the building site for 6 months, also making it ideal for open jointed cladding systems.
Although built to be strong and tear resistant, the ME020 is also designed to be applied to the most complex details. ME020 is easy to cut, fold and apply on site.
ME020 is particularly well-suited for sealing linear joints such as slab edge to frame connections, a critical junction where airtightness and weather resistance are paramount.
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.
Designed with low energy and Passivhaus standards in mind, ME020 achieves excellent airtightness down to <0.01 m2/m2.h.50Pa, helping reduce energy loss and improve thermal performance.
Particularly well-suited for all window & door installations plus linear joint connections and other demanding construction scenarios. If you are looking for enhanced durability, superior weather resistance, and the highest level of fire safety assurance.
ME020 is available in 25m rolls, with pre-cut widths from 100mm to 350mm. With its integral self-adhesive strips, ME020 creates a seamless, airtight, and watertight barrier that enhances the longevity and performance.
The ‘+’ range represents a step forward in our commitment to offering innovative, high-performance solutions to our customers. By incorporating additional features that go above and beyond traditional membrane offerings, we are positioning illbruck as a leader in providing reliable and sustainable solutions for the construction industry.