FSi Silverliner® Open State Cavity Barrier
FSi Silverliner® Open State Cavity Barrier is a ventilated open-state stone wool fire barrier designed for cavity walls and external rainscreen façades.
The barrier allows a 25 mm or 50 mm linear air gap to support ventilation and drainage while providing rapid fire protection. Its foil-faced stone wool core prevents fibre migration and carries a Euroclass A1 (non-combustible) rating, making it a safe and reliable solution for modern building envelopes.
- Fire resistance up to 120 minutes (depending on variant)
- Suitable for cavity voids up to 550 mm
- Non-combustible stone wool core with foil facing
- Air gap allowance up to 50 mm for ventilation and drainage
- Rapid dry-fit installation with no cure time
- Third-party certified to IFCC 1672
A high-performance solution for ventilated façades and cavity fire protection.
Silverliner® Open State Cavity Barrier forms a compliant barrier within ventilated cavities, helping to restrict the spread of fire and smoke while maintaining airflow. Its stone wool construction provides consistent fire performance and long-term stability across a range of façade applications.
Suitable for both new build and refurbishment projects, the barrier is used at floor edges, window reveals, and across horizontal and vertical joints where open-state cavity fire protection is required. It supports effective passive fire protection while allowing ventilation and drainage within the façade system.
In-House Metal Fabrications
Whether it’s a planned package or an urgent site requirement, our in-house fabrication team can manufacture roofing and cladding components to suit your project.
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