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    Drive performance and sustainability

    Find out how you can meet growing demand for energy without compromising on sustainability by using Shell Diala S5 BD.
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    Protect environmentally sensitive locations

    Explore the positive difference a high-performance, readily biodegradable transformer oil can make on your environmental impact.

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    Improve cold temperature performance

    Overcome the challenges of operating in extreme low temperatures with lubrication that works in the harshest conditions.

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  • Brochure

    Shell Diala S5 BD Brochure

    A readily biodegradable transformer oil with excellent cold temperature performance, providing protection and efficiency to transformers across the globe.

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  • diala s5 bd white paper

    Shell Diala S5 BD white paper

    Readily biodegradable, low aquatic ecotoxicity, and recyclable dielectric coolant.

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  • High quality formulation

    Exceeds interfacial tension, sulfur free, prevents paper degradation, outstanding oxidation stability

  • Cold temperature performance

    Suitable for extremely cold and arctic conditions

  • Low pour point

    Less than -51°C

  • Good flow properties

    Viscosity at -40°C < 1,000 mm2/s

  • Secure supply

    Supply security with local production and distribution

  • Sustainable

    Readily biodegradable, recyclable, long oil life and longer equipment life as exceeds IEC 60296 (high grade)

Specifications & Approvals

  • ASTM 3487 Type II (Inhibited)
  • IEC 60296 Ed5 (2020); Type A, fully inhibited high-grade oils
  • CAN/CSA-C50-14 (R2018) Table 1 (Class A), Type II/IV (Inhibited)

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