Comparing to other known insulating sprays Contact Lubricant is resistant to the strong mechanical loadings, doesn’t imbibe moisture, doesn’t contain isopropanol, ethylene glycol and white spirit, doesn’t evaporate, doesn’t require additional wash and lubrication of nodes. Protective lubricant forces out moisture, lubricates applied mechanisms, safely isolates electrical equipment and sensitive electronics even being in a wet condition and recovers its functions. After treatment of high-voltage equipment by the protective coating the electric arc disappears. Impact of an electric arc on contact surfaces decreases considerably that significantly increases period of operation of the equipment.