Rozep 35KV Hydraulic Oil Non Conductive Hydraulic Oil Rozep 35K Hydraulic Oil is a premium hydraulic fluid designed for use in mobile equipment hydraulic systems which operate in low temperature conditions. Because of its high dielectric strength, it can be safely used in equipment operating around overhead power lines such as elevated work platforms and man-lifts, minimizing the possibility of electrocution, since it will not conduct electricity should an oil leak occur.