The CSD Nofirno Duct Sealing System delivers certified, long-term protection for cable ducts, manholes, and building entries against water pressure, hazardous gas migration, and fire spread. Engineered using high-grade elastomeric filler sleeves and advanced silicone sealant, Nofirno provides an age-tested, 50+ year solution designed for critical utility, industrial, and infrastructure applications.
Unlike traditional polyurethane foams or inflatable bags that degrade over time, the CSD Nofirno Duct Sealing System maintains a durable, flexible seal around single, trefoil, or complex multi-cable configurations without requiring metal frames or mineral wool.
Why Choose the CSD Nofirno Duct Sealing System?
Traditional sealing methods often break down when exposed to standing water, chemical runoff, or mechanical cable movement. The CSD Nofirno Duct Sealing System eliminates these vulnerabilities by providing an age-tested elastomeric barrier that insulates individual cables. Explore our full range of cable duct sealing systems for complementary transit products.
Key Features & Technical Capabilities:
- Triple Hazard Protection: Certified tightness against high-pressure water ingress, hazardous gases (including Methane and H2S), and fire spread.
- Effortless Network Expansion: Engineered for quick re-entry—allowing contractors to add, replace, or re-route cables without destructive removal.
- Corrosion-Free & Vibration Dampening: 100% non-metallic design eliminates internal duct corrosion while absorbing physical vibration and acoustic transfer.
- Rodent & Pest Proof: High-density rubber formulation prevents rodent chew-through and termite damage to secure substation integrity.
- Adaptable Application: Bonds reliably to PVC, PE, metallic, and core-drilled concrete structures. Can be combined with AQUASTOP® for installation in active running-water ducts.
Applications & Approvals
The CSD Nofirno Duct Sealing System is widely specified across electrical substations, DNO power networks, trackside communications, and marine penetrations. For full certification documentation, visit the official CSD Sealing Systems portal.
