+44 (0)1544 312600

Low Smoke & Toxicity

The Rail & Mass Transportation sector demands materials that are self extinguishing and do not give off harmful gases when ignited.

Formalised in the BS6853 certifications these materials must also operate between -60 and +250C whilst retaining demanding physical characteristics.

In addition, designers demand materials that meet stringent cosmetic requirements, whilst taking for granted the technical and safety approvals.

Only a handful of materials have attained BS6853 Cat 1a approval, and the only one available in jet black is railsil, supplied by Primasil Silicone Ltd.

Not only has Primasil developed the formulation, but all compounds are mixed on site and a fully equipped processing facility is available to provide bespoke extruded and moulded components to your exact specifications.

Please download the extrusion and moulding grade railsil Technical Data Sheets for more information.


  • BS 6853: 1999 Cat 1a
  • CEN/TS 45545-2 HL3
  • NF F 16-101
  • DIN 5510-2
  • UL94 V0


  • Door and glazing gaskets
  • HVAC ducting
  • Cable insulators
  • Weatherproof gaskets
  • Interior trim

Call us For a custom formulation on +44 (0)1544 312600