Main > Main Forum

Is epoxy non-conductive

<< < (2/3) > >>

Kremmit:
Posted by: SoundDoc  Posted on: Today at 01:30:18pm  
--- Quote ---It may be fine for potting small circuit boards, but I'd never try and fix a cracked flyback connector with it....
--- End quote ---

I actually DID fix a cracked flyback with epoxy.  It was JB weld brand "JB Stik", which comes as a tube of ...umm.. modeling clay.  There's a core of lighter, grey "clay", inside an outer layer of darker black "clay", you just tear off a chunk, mash it up, and press it into the hole in your flyback or whatever.  I used it instead of a more liquid sealant because I didn't want any of it to drip inside the flyback itself.  The back of the package claims electrical resistance is 30,000 megohms.  It sure stopped the big, blinding arc of electric death that was pouring out of my flyback!  

RandyT:

Something to watch out for:

Just because an adhesive isn't conductive today, doesn't necessarily mean that it won't be tomorrow.

I remember a whole batch of monitors from the "old days" that started arcing out after a few years because the glue they used in the manufacture of them changed in properties and actually became conductive.  

I'm hoping that got that kind of stuff under control by now, but it's something to think about.

RandyT

ErikRuud:
Aside from the black graphite epoxy, you can also get a silver epoxy that is intended to be conductive.  It is obscenely exspensive and generally only available from electronics supply companies.

Depending on what you are trying to accomplish, you might be better off using a silicone adhesive.

AlanS17:
two words:

"hot glue"

SoundDoc:
RandyT:
That reminds me as well of a insulating insulator coating I read about a few years ago.
They were spray coating high voltage insulators with this insulating coating to prevent the connectors from rusting.
But the coating built up a higher static charge in the wind, attracting  more dust and dirt to to the insulator than normal, dropping its insulative ability, which started to cause arcing and premature failure of the insulators.... hehehe....

Kremmit:
Don't get me wrong, I use epoxy to fix just about everything, including electonic parts, I was just saying watch out for the black graphite epoxys. In this case, it would most likely not make a difference.
I was just getting at as with anything though, "Epoxy" is a general designation for a product, and there are dozens of manufacturers, and thousands of types. Its just important to ensure that the product you are using, is suited to the type of application its being used it, or it can cause even more problems.
I've never tried that "stik" epoxy for flyback repair though... ;) I usually buy a new stick every couple of years, and watch it harden in my toolbox... ;D

Relating back to the origional question...
Using just about any type of epoxy should be fine and cause no problems.
If it was a cracked circuit board your repairing, my prefered method of repair over epoxy woulf be thick CA glue, (crazy glue). It usually soaks well into the fiberglass boards, and allows you to still solder across a broken trace.


now look what I've started....

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Go to full version