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How important is it for the surface of insulators to be hydrophobic? RTV coating makes insulators impermeable.

The main function of an electrical insulator is to prevent the passage of electric current between conductors and other elements where electricity should not reach. In addition to providing support and separation between structures, it is essential that the insulator can prevent electric current from reaching hazardous structures and withstand adverse weather conditions. What happens if the insulator is unable to repel water?


The discovery of water electrolysis cannot be attributed to a single scientist. Great figures in science, such as Benjamin Franklin, Humphry Davy, and Michael Faraday, among others, made key contributions to the world of electricity and chemistry, leading to the conclusion that water, due to its ionic charge, conducts electricity.


Visual Explanation of Hydrophobic vs. Hydrophilic
Hydrophobic vs. Hydrophilic

This notion has been the foundation of many theories and has enabled us, among other great advances, to design electrical equipment that is both safe and efficient. Knowledge is power, and by increasing quality and safety standards, considering this fact allows us to take precautions to minimize the risk of electric shocks. Not only at the industrial level, but managing this knowledge is also valuable for taking precautions in our daily lives. From the placement of electrical appliances to their timely use, or even knowing what to do and what not to do in the event of a home accident.


What are the differences between a hydrophobic surface and a hydrophilic surface? 


Watch the following video to see the difference between a hydrophobic surface and a hydrophilic surface.





Speaking more specifically, the differences between a hydrophobic surface and a hydrophilic surface lie in the fact that the hydrophobic surface repels water, preventing the creation of a conductive layer of electrolytes, thus limiting the presence of an electrically conductive film. On the other hand, water adheres to and spreads over the hydrophilic surface. In the electronic field, the use of RTV Coating is essential to create that protective layer on insulators, which will greatly prevent the creation of ionic surfaces that could result in flashovers.


Thanks to HVIC coating technology, it is possible to minimize flashovers caused by contamination on the surface of electrical insulators, allowing the electrical lines to operate stably and with fewer accidents that could result in line stoppages.


How does RTV coating work to make a surface hydrophobic?


How does RTV coating work to make a surface hydrophobic? The RTV coating with silicone polymer creates a protective layer on the surface, making it impermeable not only to water but also to dust, grease, and oils. During its curing process, the silicone forms a network that creates a solid and durable coating. Thanks to its chemical structure and low surface energy, surfaces treated with RTV coating do not get wet. The coating can be applied at room temperature and on live power lines, minimizing industry costs from the outset.


At Midsun, we offer an innovative formulation of the HVIC product. Our RTV coating is unique in the market, and its quality is guaranteed. For more information on how we can support your next high-voltage insulator protection project, please contact us here.

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