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Simson ISR 70-03 FR

Simson ISR 70-03 FR is the first fire-retardant SMP solution that complies with the European fire protection standard EN45545.

Simson ISR 70-03 FR

Simson ISR 70-03 FR is the first flame retardant SMP solution that meets the demanding requirements of the railway industry.


Simson ISR 70-03 FR is an SMP adhesive specially developed for the public transport industry, which meets the internal and external sealing requirements for all design and operation categories that comply with the EN45545 standard .

Features Simson ISR 70-03 FR

Below these lines we present the main characteristics of the product:

  • Black
  • Base: MS Polymer
  • Hardness: 55 Shore A
  • Elongation at break: 250
  • Temperature resistance: -40°C to +120°C


It is the first technology-based on SMP that complies with the latest fire protection legislation, reaching the highest levels of danger according to the European standard EN45545 (HL3). This Bostik product has the following advantages:

  • Not halogenated.
  • Free of solvents, isocyanates and PVC.
  • Very good UV resistance and ageing properties.
  • In general, good adhesion on various substrates without the use of a primer.
  • Permanent elastic in temperatures from -40°C to 100°C.
  • Neutral, odourless and fast curing.

Product Applications

This SMP adhesive has been developed to meet the safety requirements of the public transport sector and the railway industry. It is also ideal for interior and exterior passenger rail sealing applications. This new sealant is ideal for sealing windows, roofs, metal frames and flooring systems, but can also be used as a construction bonding adhesive.

The world’s first flame retardant SMP

In anticipation of future legislation, Bostik has developed a new sealant that meets the highest requirements of the railway industry according to the latest European standard EN45545. In fact, it is the first fire-retardant sealant based on Silyl Modified Polymer technology. Below this video details more features of this Bostik product:

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