Verified by manufacturer 19 days ago
KIWA BDA
Certificate type
Class B fire-rated, self-adhesive breather membrane engineered for external wall and façade applications where a breather membrane is required.
Self-adhesive, Class B, breather membrane for use within external facades, typically applied directly to the sheathing board to prevent water ingress and allow vapour to escape.
The OBEX CORTEX 0521FR is a Class B fire-rated, self-adhesive breather membrane engineered for external wall and facade applications. This advanced breather membrane integrates a fire-resistant, self-adhesive backing and breathable, and airtight layer, offering a fully compliant breather membrane 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 breather membrane 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 breather membrane option for professionals seeking reliable and effective building envelope solutions.
Key benefits:
Color | Black |
Finish | Coated Textured |
Material | Polyester Thermoplastic polyurethane (TPU) |
Shape | Other Rectangle |
Length | 25000 mm |
Width | 1100 mm 370 mm |
Height | 0.38 mm |
Warranty description | 20 year |
Uniclass | |
CAWS | H22/130 Breather membrane P10/65 Breather membrane P10/320 Breather membrane H92/785 Breather membrane H31/280 Breather membrane H30/350 Breather membrane H21/130 Breather membrane H31/55 Breather membrane H30/50 Breather membrane H22/20 Breather membrane H21/20 Breather membrane |
Standard | To BS EN 13859-2. |
Third-party certification | KIWA BDA Agrément BAW-23-286-P-A-UK. |
Performance criteria | |
Water vapour properties | Water vapour transmission (Sd value) to EN ISO 12572, 0.1 m. |
Fire performance | To EN 13501-1, B-s1, d0. |
Tensile properties | To EN 12311-1, longitudinal: 255 N/50mm; transverse: 180 N/50mm.Guidance for specification option: Control values; consult manufacturer's literature for aged values. |
Class (minimum) | W1.Guidance for specification option: To EN 1928 Method A (2 kPa for two hours). |
Material | Polyester non-woven fabric with TPU layer.Guidance for specification option: Closed side adhesive: Acrylic. Liner: PP film. Manufacturer guidanceConsult manufacturer for further details if required. |
Form | Non-woven. |
Weight (minimum) | Manufacturer's standard.Guidance for specification option: Consult manufacturer for details. |
Thickness (minimum) | 0.38 mm. |
Flexibility at low temperature | To BS EN 1109 at -40°C, no cracks. |
UV resistance | Six months. |
Resistance to air penetration | To EN 12114, net leakage: 0 m³/h/m² (±100 Pa). |
Peel resistance | To EN 12316-2, before ageing: maximum peel: 10 N; average peel: 8 N. Guidance for specification option: Control value. To EN 12316-2, after ageing: maximum peel: 12 N; average peel: 9 N. |
Air permeability | To BS EN 12114, no leakage. |
Purpose | Self-adhesive external breather membrane/ vapour permeable air barrier for wall and façade applications. Guidance for specification option: For use within external facades, normally applied directly to sheathing board to prevent water ingress and allow vapour to escape. |
Width (minimum) | 1.1 m. 0.37 m. |
Roll length (minimum) | 25 m. |
PhysicalPropertiesColour | Black. |
Tear resistance | To EN 12310-1, longitudinal: 100 N; transverse: 106 N. |
Elongation to break | To EN 12311-1, longitudinal: 23%; transverse: 24%. Guidance for specification option: Control values; consult manufacturer's literature for aged values. |
Material | Polyester Thermoplastic polyurethane (TPU) |
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