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Dielectric Coatings for Electrical Insulation

HZO coatings, such as our Guardian Series™ (Parylene), are superior electrical insulators since they coat substrates with uniform thickness. Our pinhole and defect-free coatings also prevent arcing. In addition to augmenting surfaces with beneficial electrical properties, HZO coatings resist corrosion, chemicals, and humidity and maintain protection throughout extreme temperatures.

Dielectric Stength

HZO’s Parylene coatings have high dielectric strength to protect against high voltage and prevent arcing.

Electrical Properties
Dielectric strength (V) @ 25.4 µm (1 mil)
Dielectric strength (V/µm) @ 25.4 µm (1 mil)
Guardian Plus
5,500
220
Guardian Zero
7,000
276
Guardian EX
7,000
276
ASTM Method
D149
D149

Dielectric Constant

HZO coatings are low dielectric constant materials, enabling lower capacitance and better signal speed.

Electrical Properties
Dielectric constant (60 Hz)
Dielectric constant (1 kHz)
Dielectric constant (1 MHz)
Guardian Plus
3.15
3.10
2.95
Guardian Zero
2.65
2.65
2.65
Guardian EX
2.20
2.25
2.42
ASTM Method
D150
D150
D150

Other Electrical Properties

Properties such as dissipation factor, volume resistivity, and surface resistivity can be critical to your project. 

Electrical Properties
Dissipation factor (60 Hz)
Dissipation factor (1 kHz)
Dissipation factor (1 MHz)
Volume resistivity (23 ºC, 50% RH, Ω·cm)
Surface resistivity (23 ºC, 50% RH, Ω)
Guardian Plus
0.020
0.019
0.013
8.8 x 1016
1.0 x 1014
Guardian Zero
0.0002
0.0002
0.0006
1.4 x 1017
1.0 x 1013
Guardian EX
0.0002
0.0002
0.008
1.1 x 1017
4.7 x 1017
ASTM Method
D150
D150
D150
D257
D257

Need the full specs?

Our HZO Guardian Series™ material properties sheet has the necessary specifications you’re looking for to see if Parylene coatings are right for your next project. Properties include physical, mechanical, electrical, thermal, and barrier.

Download a copy today.

DOWNLOAD THE PARYLENE DATA SHEET

Ready to see how HZO can meet your protection needs?

Dielectric properties is just one of the attributes engineers find useful for their products.  Work with our team to find the best Parylene coating type to suit your application. Contact us today to learn more or get a quote.

Request A Quote & More Information

Discover how HZO can protect your product