Façade Through-Wall Sealing Systems
Proven performance, backed by expert support
Raising the standard in building performance
Today, we combine high-performance products, technical expertise, and practical support to help architects, contractors, and installers deliver projects with confidence. By continuing to share expertise, invest in innovation and solve real-world challenges, we are helping create a construction industry where quality and long-term performance are built in from the start.
As construction standards have evolved, the need for confidence in building performance has never been greater. Increased complexity and scrutiny have created demand for proven systems, expert guidance, and reliability. Through continuous investment in product development and close collaboration with customers, Obex has become a trusted partner for façade sealing systems, globally.
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Creating safer buildings
Challenging the status quo of sealing and protecting buildings through innovation, globally. Our mission Helping construction create safer, higher-performance buildings with structural integrity. Our vision
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Explore our complete through-wall system
into a fully integrated solution. Designed to work together, each component plays a vital role in managing moisture, maintaining airtightness and delivering complete through-wall performance.
The Obex Cortex FR Façade Sealing System brings together compatible breather membranes, interface sealing membranes, air & vapour control layers, sheathing boards, DPC and cavity tray systems, and accessories
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Air & vapour control layer
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A high-performance membrane installed internally to increase airtightness, control water vapour and improve energy efficiency.
Cement sheathing board
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A fire-classified board which is highly resistant to weathering and provides a surface for the installation of façade systems.
Interface sealing membrane
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Used specifically to provide a watertight & airtight seal around windows, doors, curtain walling and board/ slab-edge interfaces.
Breather membrane
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A vapour-permeable layer that protects against water ingress during construction while allowing any trapped moisture to escape.
Cavity tray system
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Installed in the cavity to collect moisture that may penetrate the brickwork, and direct through weep holes.
DPC membrane
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A membrane that prevents rising damp from the ground and protects cavity barriers from moisture ingress through the façade.
Explore the complete wall build-up with our interactive through-wall model
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Air & Vapour Control Layers: Enhancing Energy Performance
Installed on the internal side of the wall build-up, our AVCLs help control air leakage and moisture movement, supporting airtightness, building performance and long-term durability.
0230FR Air & Vapour Control Layer A2
0530FR Air & Vapour Control Layer B Suitable for Class B applications
0531FR Vapour & Air Tape B
Highest fire classification
Supports airtight sealing
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Airtightness Helps maintain airtightness across the façade.
Vapour control Limits vapour movement into the wall build-up.
Performance options Class A and B options for project fire requirements.
Airtightness from the inside.
Achieve reliable airtightness, with compatible components and technical guidance throughout the project.
Detailing support
Prompt installation support for airtight detailing, reducing programme delays.
Complete system
Compatible membranes and tapes designed to work together.
0531FR Passivhaus suitability Suitable for Passivhaus-certified construction.
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Sheathing Board: Score, Snap, Install
Our Class A1 external cement sheathing board system reduces installation time, and provides a durable substrate within the through-wall build-up.
Class A1 Designed for high-performance wall systems.
Reduced install time Cuts without power tools for faster, dust-free installation.
Weather resilient Designed for 12 months outdoor exposure.
KIWA Certified Independently tested and approved by KIWA BDA.
Cardiff Business Park 0270FR Class A1
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Score’N’Snap ® helping teams install faster and smarter No cutting discs required Eliminates dust Excellent moisture control cement board with the simplicity of score- and-snap installation. Boards can be cut without power tools, reducing preparation time and increasing installation efficiency. 0270FR Score’N’Snap® combines the durability and weather resistance of a
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How does it compare?
Score’N’Snap® 0270FR Cement Board
Fibre cement & calcium silicate board
Gypsum glass mat board
Features
Yes
No
Yes
Score & snap capabilities
36kg
42-54kg
31kg
Weight
Class A1
Reaction to fire [EN 13501-1]
Class A1
Class A1
Yes
No
Resists moisture even when cut
Yes
No
Yes
Cut without dust or noise
Yes
Yes
Yes
12 months UV resistance
Yes
EN 12467 compliant
Yes
No
Yes
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Interface Sealing Membranes: Protecting Critical Interfaces
Our ISMs form watertight and airtight seals at critical transitions, including around windows, doors, curtain walling and sheathing board edges.
Performance options Available in Class A and Class B fire classifications.
Practical application Flexible and self-adhesive options support efficient installation.
Reliable sealing Protects critical transitions between façade elements.
BBA certified Independently tested and approved by BBA.
Reduce interface uncertainty
Interfaces are often the most challenging areas of the façade to seal. By specifying the correct membrane, adhesive and installation method, project teams can achieve a durable, high-performance seal.
Compatible membranes and adhesives Clear installation guidance
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Cardiff Business Park 0500FR Class B
The only BBA approved Class B ISM system for high-risk, low-threshold areas.
0200FR Interface Sealing Membrane A2
0560FR Interface Sealing Membrane B
0500FR Interface Sealing Membrane B
Highest fire classification
Self-adhesive installation
Passivhaus approved
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Breather Membranes: Managing Moisture
Our vapour-permeable membranes protect the external wall build-up from water ingress while allowing trapped moisture to escape.
High UV resistance Designed to withstand extended exposure during construction.
Weather defence Helps protect the wall build-up from wind and rain.
Moisture control Helps manage moisture and reduce condensation risk.
KIWA Certified Independently tested and approved by KIWA BDA.
Hotel, Southampton 0220FR Class A1 W2
0223FR Breather Membrane A2 W1 Maximum water protection
0220FR Breather Membrane A1 W2
Highest fire classification
0221FR Breather Membrane A2 W2
0520FR Breather Membrane B W1 Class B weather defence
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For open-joint façades
Supporting whole system performance
Designed for compatibility, our breather membranes and sealing tapes form part of a robust façade sealing system.
Performance options Select the right fire, water and UV performance for your project.
Reliable sealing
Technical support Access technical data, guidance and installation support. Compatible membranes and tapes designed to work together.
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Cavity Tray: RapidTray ® , Speed Without Compromise
RapidTray® the next-generation cavity tray system has been designed for quick, hassle-free installation.
Engineered for speed Integrated fixing strip supports faster installation.
Class A2 Achieves A2-s1,d0 fire classification to EN 13501-1.
Adaptable design Designed to adapt to varying site conditions.
KIWA Certified Independently tested and approved by KIWA BDA.
Helping simplify complex reclad projects.
Reclad Project RapidTray ® Class A2
0241FR, 0240FR RapidTray®A2 Cavity Tray
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The next generation cavity tray system that delivers uncompromising performance and rapid installation.
The system features an integrated fixing strip for fast and precise application, along with pre-formed corners complete with high- strength sealing tape for an instant bond. This ensures a permanent, durable seal at all joints. The dry system is finished using specialist sealing tape for maximum protection.
Integrated fixing strip Pre-formed corners Sealed with tape
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Damp Proof Courses: Controlling Moisture Ingress
Our flexible, watertight DPC membranes control rising damp and prevent moisture ingress into the cavity barriers.
0240FR Damp Proof Course A2 Highest fire classification
0100FR Damp Proof Course B Industry-first Class B-s3,d0
0160FR Damp Proof Course B Self-adhesive installation
East Road, London 0240FR Class A2
Moisture barrier Prevents moisture rising or tracking through the wall construction.
Performance options Available in Class A and Class B fire classifications.
Multiple widths Various widths available for efficient installation.
Fast application Self-adhesive options available for selected applications.
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Getting damp protection right from the start.
Achieving effective protection against moisture ingress relies on more than the membrane alone. Early technical input can help resolve potential challenges before work begins, supporting an efficient installation and long-term performance.
Design support Critical details resolved Long-term performance
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Innovation built into every detail
More than individual products, our systems are designed to work together, helping deliver performance, efficiency and confidence from specification through to installation.
Complete membrane system
Breather membranes, air & vapour control layers and tapes engineered to support continuous through-wall performance.
0824FR Double-sided tape
0823FR UV façade tape
Complete ISM system
Interface sealing membranes, paste adhesive, surface primer and pre-formed sleeves for reliable moisture protection at critical junctions.
0210FR Paste adhesive Class A
0771FR Paste adhesive Class B
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Creating safer buildings
Complete sheathing board system Sheathing boards and accessories designed for efficient installation and long-term durability.
0280FR Self-drilling board screws
0816FR Sealing patches
0280FR Board joint sealant
0814FR Board jointing tape
Complete cavity tray system
Cavity trays, bonding & sealing tapes, pre-formed internal and external corners and screws developed to manage moisture within the cavity.
0243FR Internal pre- formed corners
0244FR RapidTray ® sealing tape
0242FR External pre- formed corners
0246FR RapidTray ® fixing screws
0245FR RapidTray ® double-sided tape
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The Obex advantage
Helping customers deliver projects successfully with proven systems, practical expertise, and responsive support.
End-to-end project support
Technical expertise you can trust
Installation and on-site guidance
Regular inspections and certification
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Complete Project Support
Design & Specification
Trusted expert advice to ensure each membrane system exceeds the performance & regulatory requirements.
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From design to completion
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Inspection & Certification
Regular on-site install inspections & QA reporting.
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Mock-Up & Install Training
On-site membrane performance testing & installation training.
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Have questions, need a quote, or want to learn more?
Technical Questions Send your questions to our technical team here: technical@obexuk.com Quote Request Request a quote for your upcoming project here: sales@obexuk.com
Request a free sample Send your request for free samples here: enquiries@obexuk.com
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Creating safer buildings
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