The NB850 firestop coated board system is used for fireproofing large holes containing multiple penetrations. In the event of a fire, the surface coating can quickly expand to form an insulating char layer, which together with the high-density mineral wool can prevent the spread of fire and smoke, and slow down heat conduction.

1. Fire ratings: 3 hours, 2 hours

2. CCCF certification, FM4990 approval

3. Testing standards: GB23864-2023, ASTM E814 

4. Other features,

* High heat-resistant expansion coating 

* 30-year service life 

* Halogen-free, asbestos-free 

* High-rate expansion performance of the surface coating

* Watertight and airtight related tests 

* Explosion-resistant performance that meets chemical industry standards 

* Suitable for fireproof sealing of various types of through holes 

* Can be used as fire-blocking walls for cable trenches and cable tunnels 

* Can be used as fire-blocking partitions for overhead bridges