Hot Glue On Circuitry

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=76094
Printed Date: May 17, 2024 at 8:16 PM

Topic: Hot Glue On Circuitry

Posted By: Jasonb61
Subject: Hot Glue On Circuitry
Date Posted: April 11, 2006 at 7:50 PM

Hello,

I recently purchased some M3 mirrors and like most products I get off eBay I took it apart to see how the quality looked on the inside...

Well, Luckily I found that the circuitry for the LED's was exposed! These are outside mirrors that WILL come in contact with moisture...

Anyways, I wanted to attempt and save them so I covered the circuitry (a few resistors and 2 diodes) with hot glue! The LEDs still work but im wondering if I made a mistake? The LED's wont operate for long periods of time so it wont generate a lot of heat... they will only come on with the blinker or alarm... Did I make a mistake??

-Jason

Replies:

Posted By: electrostatic
Date Posted: April 11, 2006 at 8:07 PM

use red insulating varnish or silicone. hot melt glue is easy enough to remove.

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Prove your connections, use a meter!
I promise, I'll behave!

Posted By: firstrax
Date Posted: April 11, 2006 at 8:18 PM

A lot of pc boards have a conformal coating to protect against moisture. A coated board looks almost identical to an uncoated board so your boards may have been coated. If not, conformal coatings are avaible from many electronics distributors in spray cans.

I doubt the hot glue will harm anything though.

Posted By: Jasonb61
Date Posted: April 11, 2006 at 8:22 PM

Ok *PHEW* I just needed some peace of mind... I also like the fact that hot glue will be easy to remove so I can fix a resistor or something if needed... :-D

Posted By: stevdart
Date Posted: April 11, 2006 at 8:25 PM

It's just the heat of some resistors that could unmelt the glue, and that in itself wouldn't hurt anything but put a strain on the leads if the resistor is dangling, but otherwise it's fine to use. I use it to build crossover circuit boards. And I don't put in resistors that are going to get that hot!

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.