Transformer Oil or Insulating Oil is an oil that is an oil that is stable at high temperatures and has excellent electrical insulating properties. Primary functions are to insulate and cool a transformer. It must therefore have high dielectric strength, thermal conductivity and chemical stability and must keep these properties when held at high temperatures for extended periods. It is used in oil filled transformers, some types of high voltage capacitors, fluorescent lamp ballasts, and some types of high voltage switches and circuits breakers. Maclin product is made to meet all the requirement of transformer manufacturers.