What's that "glue" used to fix bodge wires? - Page 1
Forum section: electronics / general

author: mcinque
author_rank: Unknown
timestamp: January 07, 2023, 12:50:51 am
content: Hello all!I always see that bodge wires on PCBs are often fixed with some kind of glue or adhesive.It's not always the same type, some times is white silicon gunk, other times it's a precise drop of something clear (that's what I want to achieve).See attachments.There is a precise product to be used for that kind of thing?

author: MarkS
author_rank: Unknown
timestamp: January 07, 2023, 12:52:52 am
content: The top pic appears to be clear hot glue.

author: xrunner
author_rank: Super Contributor
timestamp: January 07, 2023, 12:55:45 am
content: Quote from: mcinque on January 07, 2023, 12:50:51 amMight be UV glue. You set it with a UV light. I have some and it looks like that clear example.

author: mcinque
author_rank: Unknown
timestamp: January 07, 2023, 12:59:19 am
content: it is not clear glue, too transparent. And hot glue is very hard to apply in minimum quantities like in the first pic, for me that is not hot glue.This is hot glue.

author: Psi
author_rank: Super Contributor
timestamp: January 07, 2023, 01:24:20 am
content: It might be clear electronic grade silicone.Touching it to see how pliable it is should tell you if it's silicone vs a hard UV cure glue.https://www.digikey.co.nz/en/products/detail/chip-quik-inc/EGS10C-20G/10059587

author: bdunham7
author_rank: Super Contributor
timestamp: January 07, 2023, 01:25:45 am
content: Likely a single-component epoxy in a small syringe. You can get heat-cured or UV-cured versions.

author: tooki
author_rank: Super Contributor
timestamp: January 07, 2023, 01:27:02 am
content: Quote from: mcinque on January 07, 2023, 12:59:19 amWhat do you mean? "Clear" means "transparent".

author: Someone
author_rank: Super Contributor
timestamp: January 07, 2023, 02:54:08 am
content: Quote from: tooki on January 07, 2023, 01:27:02 amPlenty of glues advertise "clear" that is ok for a thin bonding application but end up a little milky in bulk cure. Which is why the industry had to add "optically clear" as a new category. Bonus points for refractive index matching.

author: dobsonr741
author_rank: Frequent Contributor
timestamp: January 07, 2023, 03:14:28 am
content: Search Amazon for “5 second Uv glue”. Works well on PCB bridge wires.

author: rdl
author_rank: Super Contributor
timestamp: January 07, 2023, 02:13:36 pm
content: UV curable coatings and glues do not contain volatile organic compounds (VOC), at least not in any significant quantity.

author: tooki
author_rank: Super Contributor
timestamp: January 07, 2023, 02:16:12 pm
content: Quote from: Someone on January 07, 2023, 02:54:08 amI know that, but the line I was replying to was saying that it’stootransparent to be clear?

author: tooki
author_rank: Super Contributor
timestamp: January 07, 2023, 02:17:24 pm
content: Quote from: bigfoot22 on January 07, 2023, 03:44:35 amOne big benefit is that it cures very quickly, yet doesn’t have the problems of superglue (like having very little time to work with it). It’s also much easier to remove uncured glue.

author: wraper
author_rank: Unknown
timestamp: January 07, 2023, 02:35:42 pm
content: Quote from: tooki on January 07, 2023, 02:17:24 pmThe main benefit is that it's thermally stable and non conductive. It's the same as liquid type solder mask. Superglue is a bit electrically conductive and better not try to heat it, fumes are extremely nasty.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 07, 2023, 07:28:05 pm
content: The proper designation of this is 'wire tacking adhesive'.