The UK’s first A2 rated Non-Combustible Breather Membrane

Class A2 Breather Membrane Get Free Sample

Class A2 Breather Membrane No Obligation Quote

Class A2 Breather Membrane Free Next Day Delivery

Class A2 Breather Membrane Exceptional Service

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Free next day UK delivery!


Designed to meet the highest levels of fire protection, the new
CORTEX® Breather Membrane can withstand the harshest of
weather conditions whilst being completely non-combustible!


CORTEX® Non-Combustible Breather Membrane is only available
from OBEX, so when your project demands the highest class of
fire safety, choose the only non-combustible solution available!

free next day uk delivery, get in touch today get a free sample

The UK’s only Non-Combustible Breather Membrane to feature

  • Waterproof, Vapour-permeable and Non-Combustible
  • Façade Fire Certification: EN13501-1 :
    Class A2-S1,d0
  • Roll Size: 1500mm x 50m
  • Suitable for facades with open or closed joints
  • Can be laid directly onto Sheathing Board or insulation
  • Exceptional UV Resistance

When it comes to safety always Choose Class A...

Class B membranes on the market are difficult to ignite, whereas OBEX’s CORTEX® Breather
Membrane has an A2 Euroclass rating meaning it is fully non-combustible!

Class A2 Breather Membrane
Class B Breather Membrane
CLASS B Difficult to Ignite
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Free next day UK delivery!

Call us on 01905 337800 to get your FREE non-combustible sample today


The UK’s most technically advanced
Fireproof Membrane

Colour White
Reaction to Fire A2-s1,d0 Non-Combustible (EN13501-1+A1)
Thickness 0.22 ± 0.05mm
Tensile Strength Longitudinal: 420 - 470 N/50mm
Transverse: 490 - 620 N/50mm
Tear Strength Longitudinal: 50 - 90 N
Transverse: 30 – 70 N
Low Temperature flexibility -20°C
UV resistance Not affected by UV exposure
Water Tightness Class W2 (EN ISO 12572)
Water Vapour Transmission (Sd) 0.04m
Roll Size 1500mm x 50m
get a free sample

Free next day UK delivery!

Cortex Non-Combustible Breather Membrane can be easily laid either directly onto sheathing board or insulation during the building process

Breather Membrane for Walls

A2 rated Non-Combustible Breather Membrane is part of The Cortex Range...

The CORTEX® range was developed by OBEX for every sealing scenario against water and air ingress for facades and commercial glazing. A complete range of membranes, adhesives, accessories and tools, all available from one source.

  • Non-Combustible Breather Membranes
  • EPDM Membranes
  • Adhesives
  • Primers and Cleaning Wash
  • Pre-Moulded EPDM
  • EPDM Accessories
Cortex Full Range
Cortex UV Façade Black Tape
Cortex UV Façade Tape

Cortex UV Façade Tape is a Black single sided acrylic tape with a high UV resistance and excellent bonding properties. Our tape was especially developed for sealing breather membrane overlaps, penetrations and joints. And also adheres well to non-polar and low energy surfaces.

  • Bonds well to PE foil and HDPE/PP/PE fleeces
  • High heat/wrinkle resistant
  • Guarantees an airtight seal
  • Application should be on a clean dry surface
Cortex Double-Sided Acrylic Tape
Cortex Double-Sided Acrylic Tape

Cortex Double-Sided Acrylic Tape has a high aging resistance and excellent bonding properties with a very high performance adhesive for indoor and outdoor use. Developed for joining Cortex Non Combustible Breather Membrane.

  • Application should be on a clean dry surface
  • Significant improvements to the durability & reliability
  • Acrylic dispersion adhesive system ensures the sealing bond is maintained
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