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0521FR
Self-Adhesive Breather Membrane
W1
Class B - EN 13501-1
A Class B fire-classified, self-adhesive breather membrane engineered for external wall and façade applications. This advanced membrane integrates a fire-classified, self-adhesive backing and breathable, and airtight layer, offering a fully compliant solution in line with all UK construction regulations. Read more
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3rd Party Certified
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6 Months Exposure
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6 Months Outdoor
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Class B
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Lightweight
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Breathable
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Vapour Permeable
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W1 - EN 13859-2
Downloads
Product Description
The OBEX CORTEX 0521FR is a Class B fire-classified, self-adhesive breather membrane engineered for external wall and façade applications. This advanced membrane integrates a fire-classified, self-adhesive backing and breathable, and airtight layer, offering a fully compliant solution in line all UK construction regulations.
Designed with a focus on ease of installation, superior performance, and compliance with construction standards, the OBEX CORTEX 0521FR sets a new benchmark in the field of breather and vapour permeable membranes for external applications. Its innovative features ensure it stands out as the superior option for professionals seeking reliable and effective building envelope solutions.
Key Benefits
- GOLDEN THREAD ALIGNMENT – Class B fire classified, independent of the substrate, for full compliance with Reg 7.
- REDUCE WATER INGRESS ISSUES – Rigorously tested to EN 1928 achieving W1 water resistance for ultimate performance.
- EASIER PROJECT SCHEDULING – 6 months UV resistance for optimum project scheduling flexibility.
- SUITABLE FOR OPEN CLADDING – Also available in plain black for the ultimate solution behind open rainscreen cladding.
- EASIER INSURANCE APPROVAL – Full 3rd party approval with internationally recognised KIWA BDA.
- LESS WASTE & DAMAGES – Excellent scuff and tear resistance with a highly durable outer coating.
- IMPROVED HEALTH & SAFETY – Ergonomically designed roll sizes to aid manual handling and reduce musculoskeletal issues.
- COMPLETE PEACE-OF-MIND – 20 year warranty for full confidence in the integrity of the product.
- PROMOTE YOUR OWN BRAND – Custom options available to elevate your brand’s visibility and enhance brand recognition.
- UP TO 30% QUICKER INSTALLATION – Split release liner for faster and improved installation with greater control and accuracy.
Typical Applications Include:
For use on external façades, normally applied direct to the sheathing board to prevent water ingress and allow vapour to escape.
Product Specs
Width
1100mm or 370mm options
Length
25m
Thickness
0.38mm
Colour
Black (OBEX Branded) or Plain Black
Technical Specs
Harmonised Standard
EN 13859-2
Fire Classification | EN 13501-1
B-s1,d0
Watertightness | EN 1928
W1
Resistance to air penetration | EN 12114
Net leakage 0m³/h/m²(+/- 100 Pa)
Water vapour transmission (Sd value) | EN ISO 12572
0.1m
UV Resistance
6 Months
Tensile Strength | EN 12311-2
Longitudinal: 255 N/50mm, Transverse: 180 N/50mm
Tear strength (nail shank) | EN 12310-1
Longitudinal: 100 N Transverse: 106 N
Low temperature flexibility | EN 1109
-40°C
Peel resistance of joints | EN 12316-2
Before ageing - Max peel 10 N, Average Peel 8 N. After ageing - Max peel 12 N, Average peel 9N
Product Order Codes
| Product Code | Product Description | Width | Length | Box Quantity |
|---|---|---|---|---|
| 20.0521.001 | OBEX CORTEX 0521FR Self-Adhesive Breather Membrane | 1100mm | 25m | 1 Roll |
| 20.0521.002 | OBEX CORTEX 0521FR Self-Adhesive Breather Membrane | 370mm | 25m | 1 Roll |