About NOFIRNO® Duct Seal System

The NOFIRNO^® Duct Seal System is the proven choice for watertight and gas-tight protection for cable ducts, manhole entries, duct bank entries, and similar applications where cables exit ducts or core-drill holes. This system is used extensively in the utility industries worldwide to protect critical applications in substations and other areas where fire, water and gas ingress must be prevented. Use as a better alternative for inflatable bags, foams and other duct sealing materials that often fail shortly after installation.

Features:

Provides high levels of fire, gas and water tightness
Labor savings – installs in a fraction of the time compared competitive systems
No special transit frames required
Easy re-entry for future cable changes – no need to replace material
No metal parts – no corrosion
No mineral wool in the system – protects against internal duct corrosion
Provides vibration absorption and sound dampening
Age tested to over 50 year service life
Use in conjunction with NOFIRNO® / AQUASTOP® System if running water is present in ducts
Provides excellent protection against rodent ingress