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Top 7 Uses For Parylene Conformal Coating

By Edited Jun 25, 2014 0 0

Parylene, a versatile polymer coating, is used in virtually every industry in the world. During a Chemical Vapor Deposition process (CVD), it polymerizes and becomes a film, where it is applied to virtually any surface. Unlike liquid coatings, parylene uniformly coats all surfaces, including crevices, corners, sharp points and even the tiniest of pores. And because it's pinhole free, it provides unsurpassed barrier protection.

Because of parylene’s conformal properties, it has an endless number of applications. Here’s a list of the top 10 uses for parylene:



In the last few years, Light Emitting Diodes (LEDs) seem to be everywhere. They’ve taken the place of common filament bulbs, flashlights, street lights, car headlights and outdoor advertisements, billboards and traffic signage. LEDs are more reliable and energy friendly but they do present unique challenges—they’re particularly susceptible to moisture, heat and ultraviolet rays. Parylene is useful in these situations because it doesn’t add weight or distort light, and offers maximum protection from heat, moisture and UV exposure.


The medical industry sees the most widespread and diverse uses of parylene. Parylene conformal coating is non-toxic, extremely thin, pinhole-free, biocompatible and provides barrier protection against both organic and inorganic fluids and solvents. It also withstands sterilization—E-beam, gamma, autoclave, etc. Some examples of products and components coated by parylene include needles, coronary stents, implantables, hearing aids, medicine bottles and catheters.


Vehicles ar
e characterized as extreme harsh environments, so their complex components require specialized protection. Parylene adheres to almost every surface and penetrates every nook and cranny, making it an ideal coating for sensor-based, computerized components. Parylene can be found on flow sensors, gaskets, seals, pressure sensors, circuit boards and battery/cell power systems.


Parylene is rapidly becoming the number one coating choice for electronics products and components. Along with its specialized protection properties, parylene possesses electrical insulation properties, a low coefficient of friction and a low dielectric constant. Examples of parylene-coated electronics include semiconductors, printed circuit boards, MEMs, nanotechnology and all types of sensors.



Even in space—the harshest of environments—parylene is the ideal coating of  choice. With its insulating properties, low out gassing and high thermal and UV stability, it’s used in everything from communications equipment to circuit boards to navigation control systems.



Like the aerospace industry, the aviation sector frequently experiences harsh environments. Instruments are exposed to sub-zero temperatures, UV rays, moisture and a range of chemicals and solvents. Parylene protects avionics/flight control systems, cockpit instrumentation and displays and imaging equipment, just to name a few.



Parylene’s high degree of functional protection makes it ideal for the defense  industry, where exposure to rugged conditions, extreme temperatures, high humidity and harsh chemicals is commonplace. Approved brands of parylene conform to IPC, ITAR, ISO and Mil-Spec and are used to coat a wide variety of technological products, including weaponry, radar/detection equipment, satellite electronics, circuit boards and guidance and targeting systems electronics.



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