Metal finishing Q&As since 1989

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Electrical Insulating Paint

I want to paint a metal block with an insulating type paint, this block is located in a die and when swarf material gets caught between it and another block a circuit is created which makes the pressing machine think that there is a product is position thus operating the machine at all times. At the moment I am getting the blocks powder coated as it works as an excellent insulator but this process is very expensive, I would like an alternative method of coating preferably some type of paint with non metallic properties

James Curley
production engineering - Birmingham, West Midlands, UK
2004

did you find electrical insulating paint?

Jonathan Kemp
- kailua-kona Hawaii
April 1, 2009

Hi. I would not trust paint or most powder coatings as an insulator in a critical application, but if you are just reducing a nuisance, it can be fine.

The general reason that powder coating is doing a better job for you than paint is probably the fact that powder coatings are generally thicker than paint. Powder coating is not an expensive process, but you may be encountering a minimum lot size charge, or the shop may be investing in very good pretreatment.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
April 2, 2009

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March 24, 2011

Hi,

One of our customers / users is asking about a 2 part Epoxy Insulating Paint of industrial grade. Are there any criterion that should cover in recommending this type of coating such as : temperature resistance or thermal insulation, dielectric strength, chemical resistance etc.? And can you recommend where we can get this type of product?
Thank you for your reply.

Jimmy Cahyadi
Protective Coating - Jakarta, Indonesia