VOLTRO™ Transformer Oil

Renkert’s Voltro Transformer Oils are highly refined mineral oils, derived from paraffinic crude. The Voltro products, which are severely hydrotreated and created specifically for electrical insulating and cooling applications, comply with ASTM D3487 and Doble Tops.

Choose Voltro oils for exceptional oxidation stability to help extend the life of transformers while minimizing the need for maintenance.

Our transformer oil products

Voltro I – ASTM D3487 Type I (trace inhibited)
Voltro II – ASTM D3487 Type II (inhibited)

Voltro advantages

  • conform to corrosive tests ASTM D3487
    method B and CIGRE IEC 62535
  • certified PCB free
  • DBDS free
  • passivator free
  • metal deactivator free
  • silicone free
  • a stable, low moisture oil
  • high flash point
  • exceptional oxidation stability

Applications for Voltro Oils

  • power & distribution transformers
  • switchgear & circuit breakers
  • rectifiers


  • reliable US and global distribution
  • convenient delivery by ship, truck, rail, drums or flexi bags

For questions about your oil application or to request a sample:
inquiries@RenkertOil.com or 800.423.6457