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> Non-conductive Epoxy Or Superglue, Non-conductive epoxy or superglue
Olograph
Posted: August 30, 2010 12:57 am
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Hello,

I have a cracked PCB and I'm looking at a non-conductive epoxy or super glue to put it back in one piece.

Most epoxies/glues don't have conductivity specifications on the package.
I'm not interested in buying a tube and testing it with a multimeter to find out that it is conductive.

So do you guys have any product suggestion?

Cheers


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CWB
Posted: August 30, 2010 01:06 am
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virtually all the epoxies available are "non-conductive" and have good dielectric properties .
there are conductive epoxies available ... these will be clearly marked as such .


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Solenoid
Posted: August 30, 2010 01:22 am
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I don't know for sure, but I would tend to agree with CWB. I would think that most epoxies would be non-conductive, unless otherwise rated. I would think that plain old super glue would also be non-conductive, but like I said, I don't know for sure.
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CWB
Posted: August 30, 2010 01:43 am
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super glue is non-conductive as well .
it is not the best adhesive for pcb repair .
when a pcb snaps/breaks the broken ends will have small voids that need to be filled .
super glue adhesives work best in extremely thin layers ... it is not good for filling voids .


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Olograph
Posted: August 30, 2010 02:20 am
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Thanks guys.

I didn't know that most glues are supposed to be non-conductive. What I'm gonna do is that I'll buy a product I think suits the purpose and just to be sure I'll test it with the multimeter beforehand.


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tekwiz
Posted: August 30, 2010 06:30 pm
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Yes, virtually all epoxies & most other glues are completely non conductive when dry, unless specifically stated otherwise.
In fact, epoxy is often the material of choice for high voltage insulating jobs. It's also what most circuit boards are made of.


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johansen
Posted: August 30, 2010 06:58 pm
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do not use superglue.
when you go to solder the traces back together you will find out why.


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CWB
Posted: August 31, 2010 11:24 am
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heh ...
isn't the aroma and effect on the eyes just wonderful ?
laugh.gif tongue.gif


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Olograph
Posted: September 02, 2010 09:40 pm
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QUOTE
  do not use superglue.


I used superglue for the task eventually. I had not seen your comment.
What I used is Loctite Superglue and I did not have any problem with it.
It did not make fumes or anything. Mr. multimeter indicated it was non-conductive.

I think I'll post picture of my PCB recovery project. ...It went extremely well by the way. It might be interesting for people and I might get advice to perfect my technique.

Olograph


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CWB
Posted: September 03, 2010 12:27 am
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one of the problem with superglue when it is heated (as in soldering/bridging a broken trace) is the fumes . gaaaakkk , my eyes (and nose) !

i tried super glue years ago in repairing a PCB ... it failed after a period of time .
this was even with "fish-plating" both sides of the board with small pieces of phenolic board and using a small "C" clamp and wood to compress the repaired section .
since then i have used epoxies .


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tekwiz
Posted: September 03, 2010 08:39 pm
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Super glue does work, but epoxy works better, because it matches the original board material. Epoxy also fills gaps, which superglue does not. I mean liquid epoxy, not those epoxy putties.


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xiphmont
Posted: November 02, 2010 03:47 pm
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QUOTE (CWB @ August 29, 2010 08:43 pm)
super glue is non-conductive as well .
it is not the best adhesive for pcb repair .
when a pcb snaps/breaks the broken ends will have small voids that need to be filled .
super glue adhesives work best in extremely thin layers ... it is not good for filling voids .

It depends on the superglue. Many 'home use' superglues these days are sold with a silicate filler, and these do fill small gaps. If it's not a thinner-than-water viscosity, it's likely a silicate filled version.

That said, I'd not use superglue either. It's sorta like duct tape--- very versatile, but somehow the job always turns out messy and temporary. The only permanent thing I ever use it for is gluing LEDs to acrylic (it bonds to PMMA *extremely* well). It does not stand up to loading stress or humidity. It tends to throw bloom all over the place too.
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AwesomeMatt
Posted: November 02, 2010 04:25 pm
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Two months late to the party, but, since it's gravedug... even JB Weld, which is a machinable epoxy with steel inside it.. is non-conductive. As claimed on their website, and as tested by me.
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tekwiz
Posted: November 02, 2010 08:20 pm
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I saw a real smart super glue packaging setup in the local dollar store
The package had several tiny tubes of glue in it, instead of one larger one. Clever. thumbsup.gif


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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CWB
Posted: November 02, 2010 09:57 pm
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QUOTE (AwesomeMatt @ November 02, 2010 10:25 am)
Two months late to the party, but, since it's gravedug... even JB Weld, which is a machinable epoxy with steel inside it.. is non-conductive. As claimed on their website, and as tested by me.

somehow i would not want to use jbweld around hv .


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tekwiz
Posted: November 03, 2010 07:14 pm
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QUOTE (CWB @ November 02, 2010 12:57 pm)
QUOTE (AwesomeMatt @ November 02, 2010 10:25 am)
Two months late to the party, but, since it's gravedug... even JB Weld, which is a machinable epoxy with steel inside it.. is non-conductive. As claimed on their website, and as tested by me.

somehow i would not want to use jbweld around hv .

I'll bet it would be cool in a nuker, though. Sorta like nuking CDs.


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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davelectronic
Posted: July 05, 2011 11:10 pm
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I get through loads of two part epoxy resin, its the fast acting stuff good on high temprature, ive even used it on transformer windings, its amazing stuff, secure small wires on boards, only on things i dont plan to take apart again. I keep a range of bonding agents in my box, they all have individual uses, i would go epoxy on pcb boards, S glue can make it brittle. Dave.


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CWB
Posted: July 06, 2011 01:30 pm
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as long as this thread has been re-re-excavated/exhumed ... a finding on the small tubes of super glue eric mentioned .
i bought some of these , used one tube and stashed the rest in a drawer .
six months later i dug one out and it was useless ... the rest proved to be as well .


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tekwiz
Posted: July 08, 2011 06:03 pm
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QUOTE (CWB @ July 06, 2011 04:30 am)
as long as this thread has been re-re-excavated/exhumed ... a finding on the small tubes of super glue eric mentioned .
i bought some of these , used one tube and stashed the rest in a drawer .
six months later i dug one out and it was useless ... the rest proved to be as well .

Interesting. The ones I bought are still good, I just checked. Were your tubes still sealed?
I know the stuff has a limited shelf life, but it's usually well over a year, provided the tubes are sealed.


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Trouble rather the tiger in his lair, than the sage among his books.
For to you, kings & armies are things mighty & enduring.
To him, mere toys of the moment, to be overturned at the flick of a finger.

Fortuna favet fortibus.
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CWB
Posted: July 10, 2011 02:39 pm
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yep ... the tubes were "factory pristine" .

maybe small glass ampules would work better ...
i am thinking of those "perfume samplers" that my mom and sis had in the early 60s . they were somewhat like a "book of pins/needles" .
the assortments were color coded ... i thought they were cool .
when i was 10 or so i obtained some small bore thin walled glass tubing and made travel ampules of their favorite perfumes .


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GPG
Posted: July 10, 2011 03:28 pm
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johansen
Posted: July 10, 2011 04:41 pm
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I've got some adhesive systems' RP-1000 super glue.
seems like pretty typical stuff, but its got a viscosity of 1000 cps, so you can't get it in your eyes.
I've got a bottle that expired in '09, its still good.

unfortunately i think the easiest way to get some would be to ask the company for free samples.


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