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Hot glue from glue gun - can I use it?

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Old 11-04-07, 03:10 AM Thread Starter   #1
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Hot glue from glue gun - can I use it?


I want to stick a mounting bracket permanantly to a pentium III motherboard. The area I will be covering is large and I will need to glue over a MOSFET and cap's and some IC's...

Can I use hot glue from a glue gun? Is it electrically insulative?

If not, should I apply nail varnish to the board before I glue it?
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Old 11-04-07, 06:22 AM Thread Starter   #2
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Is there some other similar glue that anyone can recommend if I cannot use it?
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Old 11-04-07, 06:33 AM   #3
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2-component epoxy.
While hot glue isn't conductive it's not strong enough for any permanent application.
Especially when the components that are glued produce heat...

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Old 11-04-07, 06:42 AM Thread Starter   #4
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The problem is that I have a gap of about 8mm to fill between the bracket and the mobo.

That would take a lot of epoxy and it tends to be too runny to fill such a big gap...

No weight will hang from it at all, so strength is not a problem.

Good point about the heat - more problems to concider, yay...
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Old 11-04-07, 04:35 PM Thread Starter   #5
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Okay, I can get around the MOSFET, but will still cover some small capacitors and other IC's. Is this okay?

I am getting itchy hehe...
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Old 11-04-07, 05:47 PM   #6
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you could try the plyable epoxy? its a bit like clay. sold in a 2 component stick that you have to mix... and then you can put it on (great as a filler or for 'creating' parts)

remember that most (if not all) glue types dont take heat too well...
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Old 11-05-07, 01:32 AM Thread Starter   #7
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Thanks for the suggestions!

Ill meander over to my builders shop and see what epoxies I can get..

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Old 11-05-07, 01:33 AM Thread Starter   #8
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to OCF AlexanderB!
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Old 11-05-07, 02:19 AM   #9
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You can certainly use hot glue on most parts of your board, I use it all over my board to hold wires in place.

I can even show you a picture if you would like.

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Old 11-05-07, 02:48 AM Thread Starter   #10
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Quote:
Originally Posted by Deanzo View Post
You can certainly use hot glue on most parts of your board, I use it all over my board to hold wires in place.

I can even show you a picture if you would like.
Hey you are right! the voltmod boys use it to hold little soldered wires in place! I remember seeing it now, no need for a picture thanks!

Do you think a MOSFET on a P III board could really melt it?
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Old 11-05-07, 03:12 AM   #11
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I have no idea how hot those get... I'd say no problem.. and if not, you'll find out soon enough :P
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Old 11-05-07, 03:13 AM   #12
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Even not melting it, they will soften that cured glue, imo use some epoxy putty is the best cause they will cured like a stone like material.

Anyway, since mosfet will heat up, what ever material you're going to use, make sure you test it 1st on a disposable glass outer surface, once cured, pour a hot water in it to see if the heat is affecting that material.

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Old 11-05-07, 06:11 AM   #13
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Quote:
Originally Posted by bing View Post
Even not melting it, they will soften that cured glue, imo use some epoxy putty is the best cause they will cured like a stone like material.

Anyway, since mosfet will heat up, what ever material you're going to use, make sure you test it 1st on a disposable glass outer surface, once cured, pour a hot water in it to see if the heat is affecting that material.

or ignite it :P

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Old 11-05-07, 08:28 AM   #14
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Can you show us a picture?

I have used hot glue to attach alot of electronics and have never had a problem but i'm not sure exactly what you are doing.

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Old 11-05-07, 08:35 AM   #15
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Hot glue is fine for cold part of the pcb, power mosfet or inductor are known to be warm or even hot, not good for "hot" glue !

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Old 11-05-07, 09:49 AM Thread Starter   #16
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Quote:
Originally Posted by bing View Post
Even not melting it, they will soften that cured glue, imo use some epoxy putty is the best cause they will cured like a stone like material.

Anyway, since mosfet will heat up, what ever material you're going to use, make sure you test it 1st on a disposable glass outer surface, once cured, pour a hot water in it to see if the heat is affecting that material.
Thats a good idea, I'll try that

Quote:
Originally Posted by gangaskan View Post
or ignite it :P
Eeeewwww - burning glue stinks like crazy!

Quote:
Originally Posted by speed bump View Post
Can you show us a picture?

I have used hot glue to attach alot of electronics and have never had a problem but i'm not sure exactly what you are doing.
Hmmm, you will just have to wait and see - its very ghetto. Once I have all the parts I need I'll post

Quote:
Originally Posted by bing View Post
Hot glue is fine for cold part of the pcb, power mosfet or inductor are known to be warm or even hot, not good for "hot" glue !
I can glue around the one MOSFET that is in the way, so should be fine!

Thanks guys, I'll get some different epoxies and hot glue and see what I can come up with. I also thought of using car exhaust repair putty as a gap filler since it is resistant to heat. Will let you know what I am up to soon!

byebye
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Old 11-19-07, 07:00 AM   #17
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My worry would be insulating heat that needs to escape. You might cover something up that gets hot, and hot enough to cook the component if covered. You got a IR temp gun to measure temps? Maybe set your comp up on a test stand and run a stress test and check the temp of the components you want to cover first? Have to get within a cm to get a good reading on those tiny suckers.
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