Engineered for critical infrastructure, the NOFIRNO® Duct Seal system is the go-to solution for high-performance protection in underground and above-ground ducting. Whether it’s a fibre optic rollout, a utility substation, or a high-risk industrial environment, NOFIRNO® delivers unmatched resistance to fire, water, gas, and rodent ingress – all in one flexible, low-maintenance system.
NOFIRNO® Rapid Duct Seal
Premium protection in every environment. With over 100,000 kits installed across the UK, NOFIRNO® is a trusted choice for clients who demand long-term reliability without compromise.
NOFIRNO® Rapid Duct Seal
Key Benefits
- Up to 4 hours fire resistance – independently tested and certified.
- Watertight and gastight – pressure-tested up to 10 bar in small openings.
- No frame required – flexible installation in any shape or size duct.
- Future-proofed – easy re-entry for adding or replacing services.
- Proven longevity – over 50 years of age-tested sealing integrity.
Designed For
- Power and utility networks
- Data centres
- Transportation infrastructure
- Civil and commercial construction
- Renewable energy facilities
Useful Information
Find everything you need to specify, install and maintain CSD systems. Access the latest datasheets, certifications and installation guides, all in one place.
The installation advantage
Available as a complete kit with simplified instructions and access to our online installation video hub, the NOFIRNO® Duct Seal helps your team get the job done faster and with full confidence. Or, let our CSD Technical Services team handle everything – from design to installation to inspection.
“Over three decades, we’ve seen every kind of site condition and challenge. Our clients come to us because they know we’ll deliver the right solution every time. As industries evolve, so do we, by developing new products, expanding into new sectors and continuing to protect the infrastructure that keeps the world running.”
David Ripley
CSD Sealing Systems