Properties of Parylene N, C & D

PropertiesParylene NParylene CParylene DTesting Method (ASTM)
Dielectric StrengthVolts/mil700069005500D149
Dielectric Constant60 Hz-2.653.152.84D150
1 kHz-2.652.832.82
Dissipation Factor60 Hz-0.00020.0270.004
1 kHz-0.00020.0150.003
Volume ResistivityΩ·cm1.4 x 10176.9 x 10162 x 1016D257
Surface ResistivityΩ1.0 x 10132.2 x 10155 x 1016D257
Coefficient of Friction-0.250.290.33D1894
Service Temperature°C90110120-

Please inquire for a table of additional properties.

Parylene N, C, and D Properties

Typical Parylene Properties

Dielectric Strength, Volts/mil
Parylene N7000
Parylene C6900
Parylene D5500
Testing Method (ASTM)D149
Dielectric Constant
60 Hz
Parylene N2.65
Parylene C3.15
Parylene D2.84
ASTMD150
1 kHz
Parylene N2.65
Parylene C2.83
Parylene D2.82
ASTM-
Dissipation Factor
60 Hz
Parylene N0.0002
Parylene C0.027
Parylene D0.004
ASTMD150
1 kHz
Parylene N0.0002
Parylene C0.015
Parylene D0.003
ASTMD150
Volume Resistivity, Ω·cm
Parylene N1.4 x 1017
Parylene C6.9 x 1016
Parylene D2 x 1016
ASTMD257
Surface Resistivity, Ω
Parylene N1.0 x 1013
Parylene C2.2 x 1015
Parylene D5 x 1016
ASTMD257
Coefficient of Friction
Parylene N0.25
Parylene C0.29
Parylene D0.33
ASTMD1894
Service Temperature, °C
Parylene N90
Parylene C110
Parylene D120
ASTM-

Please inquire for a table of additional properties.

The Different Types of Parylene Coatings: Parylene N, C, and D

Parylene coatings offer a range of properties suited to specific application needs. Each type—Parylene N, C, and D—has unique characteristics that make it ideal for different environments and requirements. Here’s a closer look at what sets these types apart:

Parylene N

Parylene N is the basic type of Parylene, known for its high dielectric strength (7000 volts/mil) and excellent conformal coverage. With a lower dielectric constant of 2.65 across 60 Hz and 1 kHz, it provides stable electrical insulation, making it suitable for applications that require precision dielectric properties. Additionally, Parylene N has an incredibly high volume resistivity, which enhances its ability to protect against electrical interference. Its service temperature up to 90°C makes it suitable for moderately high-temperature environments.

Parylene C

Parylene C is a widely used variant due to its balanced performance across multiple factors. With a dielectric strength of 6900 volts/mil and a higher dielectric constant (2.83–3.15), it is an excellent choice for electronic and medical applications requiring enhanced electrical insulation and barrier properties. Parylene C also provides superior resistance to moisture and chemicals, making it ideal for harsh environments. Its slightly higher coefficient of friction (0.29) allows it to perform well in applications requiring moderate abrasion resistance. Parylene C is frequently used in medical, aerospace, and industrial applications where both environmental and electrical protection are essential.

Parylene D

Parylene D is engineered for high-temperature applications, with a service temperature of up to 120°C, making it the preferred choice for more extreme environments. With a dielectric strength of 5500 volts/mil and a dielectric constant of around 2.82–2.84, Parylene D provides reliable insulation while maintaining stability under thermal stress. It also offers robust resistance to solvents and acids, making it suitable for demanding industrial and automotive applications. With its high durability and thermal resilience, Parylene D is well-suited for critical applications in the aerospace, electronics, and automotive industries.