MTFCA Forum

Does anyone know where I can find the non conductive black paint for the tops of ignition coils? Searching through the old forum threads didn’t really come up with anything.

Brad

Brad

I ask this with sincerity and seriousness: have you ever FOUND a conductive black paint?

when I first started rebuilding coils, I had great angst over this subject. My results are as follows: Much experimentation; Multiple flat black paints sampled; plenty of test equipment involved; no conductive flat black paint found when applied to a wood substrate. A careful search of the forums will reveal a single picture of black paint giving an ohm reading in the meg-ohm range. I could not replicate that finding and never got a reading at all using a FLUKE 77 on a refinished coil. After testing 4-5 brands, I quit testing and reverted to a no-name brand paint for its low cost and have never had a problem.

This is one of those subjects that lends itself to producing experts who have never put in the legwork but have the answers anyway. From my experience, I think you have little to worry about.

Was it paint, or was it ink or black stain? Don't know that I have ever seen any sign of black paint on any of the coils that I have worked with.

Mark Gregush wrote: ↑

Wed Sep 22, 2021 11:23 am

Was it paint, or was it ink or black stain? Don't know that I have ever seen any sign of black paint on any of the coils that I have worked with.

"original" is always a difficult question to answer.
Answer to non-conductive paint
Don't use Acrylic Paint https://acrylicartworld.com/does-acryli ... ectricity/
So can acrylic paint conduct electricity? Yes, despite being plastic and water based, acrylic paints are good to moderate conductors of static electrical charges. More specifically, there is a particular type of paint called Conducive Acrylic Paint which is actually designed to conduct small amounts of static currents.

The use of Stain is questionable if oil based since some oils could be conductive, also additives are an unknown.

https://www.corrosionpedia.com/definiti ... ve-coating
What Does Non-conductive Coating Mean?
Non-conductive coatings are specialized coatings that limit the transfer of heat or electricity to the metal substrate with the coating applied. Most non-conductive coatings are organic in nature and achieve their insulative properties by being devoid of conductive metals such as copper, zinc and nickel. Classes of non-conductive coatings include:
Polyurethanes
Epoxies
Ceramic coatings
Polymers