RST – Rail System Testing GmbH – is a leading independent material testing laboratory based in Berlin, Germany. ISO/IEC 17025 accredited by DAkkS, RST provides accredited fire testing and reaction-to-fire classification, materials characterization, damage analysis, and environmental testing across a broad range of industries.

Despite the "Rail System Testing" name, their laboratory scope extends well beyond rail. RST tests materials for construction, aerospace, automotive, industrial manufacturing, and R&D programs, wherever a traceable, independent test result is required. The combination of in-house laboratory capability and engineering expertise means clients receive a full technical interpretation of results, not just a test certificate.