Another common emerging trend aimed at electricians to solve issues facing them regards to insulation is the use of nano coating, of which parylene coating is most preferred. This kind of coating provides versatile advantages that enhance top electrical structures, afford durability, and lessen the maintenance charge. But what does nano coating mean and why do electricians recommend it for commercial purposes so willingly? This paper seeks to discuss the dossier of nano-coating especially known as parylene coating and why it is getting consideration in commercial use.