One-Piece Modular Roofing Membrane

Class B – EN 13501-1

OBEX CORTEX 0400FR Class B Modular Roofing Membrane is a flexible membrane used for covering module roofs to protect against water ingress and weathering during the construction, storage, transportation and install stages of the project.

The membrane achieves a fire classification of B-s3,d0 according to EN 13501-1 and is highly UV resistant, watertight and airtight.

The 0400FR membrane is very robust and can withstand high levels of foot traffic during the construction and installation of the module.

Typical Uses

  • Modular Unit Roof Sealing
  • Temporary Building Roof Sealing

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  • Class B Class B
  • EN 1928 - EN 13984 EN 1928 - EN 13984
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Product Specs


up to 5 metres




1 membrane per pack

Technical Specs

Fire Classification | EN 13501-1


Watertightness | EN 1928

Pass – 2 kPa for 24 hours

UV Resistance

10+ years

Tensile Strength | EN 12311-2

Longitudinal – 2490 N/50mm, Transverse – 2079 N/50mm

Static Load Resistance | EN 12730


Impact Resistance | EN 12691


Product Order Codes

Product CodesProduct DescriptionWidthLengthBox Quantity
20.0400.001OBEX CORTEX 0400FR Modular Roofing Membrane - Class B-s3,d0up to 5mCustom1

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