Over many years and after a number of high profile fires within enclosed tunnels in various locations around the world.

The need was required to provide concrete structures such as tunnels with a fast cost effective solution of passive fire protection.

In response to the growing concerns, a test was developed which provided a sound technical solution.

The fire test which is now internationally recognised, is the (RWS-standard) Rijkswaterstaat.

In brief the test requires that any passive fire protection product must withstand the extreme high temperatures

that are experienced within tunnels in the event of a fire breaking out, some times exceeding 1350°C.

SLV external has been successfully tested to exceed the requirements of RWS when applied to both steel and concrete line tunnels.

SLV external has been applied on various tunnels and among which: 

   - a large number of pedestrian walkways around Poland's capital Warsaw

   - a concrete Railroad Tunnel under the Orbital Ring Route around Poland's capital Warsaw

   - a combined building and trafic fly-over in Leeds - UK 

For a full list of all current data, please contact Nestaan direct for assistance.