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About Armacell

New Armaflex Rail SD insulation for railway vehicles

Armaflex Rail SD,SD-C,ZH, and ZH-C manufactured by Armacell, is the first closed-cell insulation material to offer greater fire safety for railway passenger vehicles.

The completely new synthetic rubber achieves HL 2 according to the new European standard EN 45545-2, a hazard level previously unattained by flexible insulation materials.

The highly flexible elastomeric foam has very good fire properties and extremely low smoke density, achieving an excellent Euroclass Bs1 D0 rating for insulation tubes. The smoke development of Armaflex Rail SD is 10 times lower than that of a standard elastomeric insulation products and the material is self-extinguishing, does not propagate fire or produce burning droplets.

Because it is a closed-cell insulation material with low thermal conductivity and high resistance to water vapor diffusion, Armaflex Rail SD provides installations with reliable long-term protection against energy losses and condensation. As is the case with all Armaflex products, Armaflex Rail SD has a ‘built-in’ vapor barrier.

Armaflex Rail SD is available in different insulation thicknesses for a complete range of tubes, sheets, self-adhesive sheets and tape. A great advantage of the synthetic rubber, which becomes particularly apparent in the tight installation situations involved in rail vehicle construction, is the highly flexible nature of the material.

The homogenous, three-dimensionally linked structure of elastomeric insulation allows the sheets to be cut neatly without the release of dust or fiber particles which could pose a health threat if breathed in. The high flexibility of the material also allows simple installation even on complex-shaped HVAC fittings and equipment. Application times can be further reduced by using self-adhesive sheets..


ArmaFlex Rail

In rolling stock, heating, ventilation and air-conditioning (HVAC) equipment is the second largest energy consumer after the traction. Insulating this mechanical equipment with our closed-cell and highly flexible ArmaFlex Rail products is one of the simplest and most efficient measures to save energy in railway vehicles. We are also proud to be the first flexible closed-cell insulation to meet hazard levels 2 and 3 for railway vehicles according to EN 45545

ArmaForm Cores

Lightweight constructions offer enormous potential for weight savings in a wide range of rail applications. Innovative composite solutions which are based on our recyclable ArmaForm core materials can significantly reduce the weight – from the driver´s cab, body shell and floor to doors, lavatory modules, compartment walls and tables.

Insulation Applications:

  • HVAC Systems
  • Floor
  • Lavatory Module


Structural Applications:

  • Front End
  • Body Shell and Floors
  • Tables
  • Doors
  • Lavatory Modules
  • Compartment Walls

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