Parylene N Datasheet (PDF Download) Parylene Properties Explained

Parylene is the generic name for poly-para-xylylenes. These conformal coatings come in several varieties, including Parylene C, Parylene F (VT-4), and Parylene N. Parylene properties provide superior barrier protection in the form of thin, pinhole-free coatings applied to components and devices to sustain product life and bolster reliability. Parylene is biocompatible and complies with REACH, RoHS, and Prop 65.

Learn more about what Parylene is used for

Parylene N Properties

Parylene N has the highest dielectric strength of the Parylenes, has a melting point of 420°C (or 788°F), and is a commercially available halogen-free Parylene. To see the properties of Parylene N, you can view the HZO Parylene datasheet below, under the column of HZO Zero™, our Parylene N offering, and read a short description of notable Parylene properties. (For reference, HZO Guardian Plus™ is our Parylene C coating solution, ideal for corrosion resistance).

You can also download the datasheet.


Parylene Mechanical and Physical Properties

Parylene has a relatively high yield and tensile strength compared to other polymer coatings, with substantial wear resistance. In general, Parylene provides superior mechanical protection.

Parylene N Young’s Modulus

Young’s modulus measures the stiffness of solid material or resistance to elastic deformation. The values for Tensile Strength and Young’s Modulus for Parylene N and C can be found below and for polyester and polyamide.

Table 1: Young’s Modulus and Tensile Strength for Parylene C and N and Polyester and Polyamide

Material Young’s Modulus Tensile Strength
Polyester 7.1×105 psi MD 29,000 psi MD
Polymide 3.6×105 psi ~33,500 psi
Parylene C 4.6×105 psi 10,153 psi
Parylene N 3.5×105 psi 6,526 psi



Parylene Electrical Properties

Parylene is a superior electrical insulator with excellent uniformity, and the pinhole and defect-free coverage helps the coatings prevent arcing. Although the insulating properties of the Parylene increase with thickness, they are defined by the fundamental composition of the coating. Each type of Parylene has different properties, and by selecting a specific thickness and type, you can fine-tune electricity-blocking properties.

Parylene Dielectric strength

Dielectric strength is the maximum voltage required to produce a dielectric breakdown through the coating material, expressed as Volts per unit thickness. This is an essential property for higher voltage design, as it protects against high voltage from static electricity and arcing.

Read more about Parylene’s optical properties

Parylene Thermal Properties

Read more about Parylene temperature range

Like all materials, Parylene coatings degrade as the temperature increases but have high melting points. The temperature stability values for the Parylenes are listed in the table below.

Table 2: Parylene Thermal Properties

Parylene Type

Long-Term Temperature Limit (°C)

Duration=~10+ Years

Short-Term Temperature Limit (°C)

Duration=~1 Month

Melting Point Temperature (Tm)
Parylene N 60 96 420
Parylene C 80 115 290

Read more about Parylene Removal 


Parylene Barrier Properties

Parylene coatings provide an excellent physical barrier that protects the components coated from electrical shorting and external contamination. The coating blocks gases that can lead to corrosion of the coated object and serves as a physical barrier to protect from sources of contamination, including foreign object debris (FOD), dust, airborne salts, and metal filings. Parylene also has exceptional chemical resistance.

Gas permeability and water vapor transmission rate (WVTR) are important properties for evaluating corrosion resistance; the lower, the better. The table below illustrates these properties in Parylene and other conformal coating materials.

Table 3: Barrier Properties of Conformal Coatings

Polymer Gas Permeability at 25 °C, (cc·mm)/(m2·day·atm) WVTR,(g·mm)/(m2·day)
N2 O2 CO2 H2 H2S SO2 CI2
Parylene C 0.4 2.8 3.0 43.3 5.1 4.3 0.1 0.08
Parylene N 3.0 15.4 84.3 212.6 313 745 29.2 0.59
Parylene F (VT-4) 16.7 0.28
Epoxy (ER) 1.6 4 3.1 43.3 0.94
Polyurethane (UR) 31.5 78.7 1,181 0.93
Silicone (SR) 19,685 118,110 17,710

Watch Dr. Clancy’s webinar on proven methods of corrosion resistance

About HZO

HZO is focused on increasing coating efficiency and driving down Parylene costs. We provide scalable Parylene equipment and automated Parylene masking to save time and labor within our turnkey solution. Contact us today if you are considering Parylene for your application and would like to speak to an engineer.

Mallory McGuinness

As a veteran writer with over a decade of writing experience, Mallory McGuinness has spent the last two years at HZO learning about coating technology from the best minds in the industry. Professionally, Mallory is especially interested in the process of problem-solving and watching how the engineering team develops solutions that ensure business requirements are met. In her free time, you can find Mallory walking her dog Ebbie, fueling up on coffee, watching the Simpsons, and referencing the Simpsons.

All of Mallory’s blogs are reviewed for accuracy before publication.

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