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Electronics => Beginners => Topic started by: 2X on June 02, 2020, 07:23:57 pm

Title: PCB Motherboard - Glue
Post by: 2X on June 02, 2020, 07:23:57 pm
Hello,
does anyone knows which is the name (or a link to buy) of the red glue at the yellow circles on the image? This PCB is a motherboard.
Title: Re: PCB Motherboard - Glue
Post by: flolic on June 02, 2020, 08:44:28 pm
I am using NE8800T Seal-glo red epoxy from Fuji chemicals. I bought it on ebay so can not guarantee it is genuine (probably is), but it works great.
It is very strong and hard epoxy when set.
Title: Re: PCB Motherboard - Glue
Post by: Gyro on June 02, 2020, 08:49:13 pm
It looks like the same stuff as they use for gluing down SMD parts when they're going to be wave soldered, if so, it has decent (short term) temperature resistance.
Title: Re: PCB Motherboard - Glue
Post by: 2X on June 03, 2020, 06:03:46 am
Quote from: Gyro on June 02, 2020, 08:49:13 pm
It looks like the same stuff as they use for gluing down SMD parts when they're going to be wave soldered, if so, it has decent (short term) temperature resistance.

Yes it seems like glue for SMD components. Which is the neme (brand) of that glue?
Title: Re: PCB Motherboard - Glue
Post by: Psi on June 03, 2020, 06:19:28 am
Often used to hold parts on the PCB if it needs to go through re-flow oven upside down and the part is too heavy to stay on board from surface tension alone.

Also used for wave soldering SMT, but that isn't so common any more.
Title: Re: PCB Motherboard - Glue
Post by: jpanhalt on June 03, 2020, 09:17:34 am
Quote from: 2X on June 03, 2020, 06:03:46 am
Quote from: Gyro on June 02, 2020, 08:49:13 pm
It looks like the same stuff as they use for gluing down SMD parts when they're going to be wave soldered, if so, it has decent (short term) temperature resistance.

Yes it seems like glue for SMD components. Which is the neme (brand) of that glue?

Loctite (Henkel) makes some.  For home use, I just use medium cyanoacrylic glue (CA, "superglue").  The latter is not usually colored.  Loctite thread locker adhesives historically are colored red, blue, and green depending on their properties.  I believe Loctite's PCB adhesive is red or blue.  At least, that is the color I have seen.

The circled red blob on the far right does not look like one of those adhesives to me, though.
Title: Re: PCB Motherboard - Glue
Post by: Sceptre on June 03, 2020, 04:17:19 pm
Loctite Chipbonder 3621:
https://www.henkel-adhesives.com/es/en/product/electrically-non-conductive-adhesives/loctite_3621.html (https://www.henkel-adhesives.com/es/en/product/electrically-non-conductive-adhesives/loctite_3621.html)

There's also 328, but that's orange:
https://www.hisco.com/Product/1099563-34899 (https://www.hisco.com/Product/1099563-34899)
Title: Re: PCB Motherboard - Glue
Post by: 2X on June 04, 2020, 05:40:42 pm
Also I found the below glue for SMD components

Part No.:SMA10SL
https://uk.farnell.com/electrolube/sma10sl/adhesive-syringe-10ml-sma/dp/106610