Thin-walled: flexible, light, space-saving. Very good fire protection properties. Very low development of toxic gases in the event of a fire. Approved for rail vehicles. Halogen-free. TR27 is used where there are special requirements for the fire behavior of materials and components. This is the case in buildings and means of transport with high concentrations of people, material assets or safety requirements. These include, for example, rail vehicles, tunnels, hospitals, airport buildings, schools, elevators, etc.