Yellow Epoxy Like Material on PCB?

  • Thread starter Thread starter BuddyBoy
  • Start date Start date
  • Tags Tags
    Pcb
Click For Summary
The discussion centers around a yellow epoxy-like material found on a PCB, speculated to be a two-part polyurethane used for protection against vibration and environmental damage. Participants express curiosity about its removal without damaging the PCB, with suggestions including paint strippers like dichloromethane. Concerns are raised about the safety of using such chemicals, especially without proper equipment and experience. The voltage of the PCB is clarified as 12 V DC, indicating it is not high voltage. Understanding the material's composition is essential for determining the safest removal method.
BuddyBoy
Messages
41
Reaction score
2
I've seen the black epoxy on various pcbs to encapsulate it. I've also seen plenty of times a Clear coating. But this is my first time seeing this yellow stuff? Any idea what it is?
IMG_20240905_224237182.jpg
 
Engineering news on Phys.org
BuddyBoy said:
But this is my first time seeing this yellow stuff? Any idea what it is?
My guess would be a two part polyurethane, being used there to protect surface components from vibration, physical and environmental damage.
 
Baluncore said:
My guess would be a two part polyurethane, being used there to protect surface components from vibration, physical and environmental damage.
Hey thanks. Any idea on how to remove it without damaging the PCB or what's underneath it?
 
BuddyBoy said:
Hey thanks. Any idea on how to remove it without damaging the PCB or what's underneath it?
Why do you want to remove it?

If you knew exactly what it was, you could probably find out what the recommended removal chemical is. But as @Baluncore implies, such chemicals are usually pretty dangerous and should not be used unless you have access to a chemical fume hood and experience using hazardous chemicals.
 
Thread 'One pin AC connector  (Coaxial)'
I was reading about someone building a DC house, because this would make solar+battery more efficient. I was wondering what those plugs would look like, but found that there didn't seem to be any standard for DC 120v plugs and sockets. So I thought I'd try to make one, just for kicks: This is based loosely on the 12v coaxial cable that most AC/DC adapters use. I figured that for 15A it would need to be bigger. It has four pins and so can carry both AC and DC, or 120v and 240v, or...

Similar threads

  • · Replies 21 ·
Replies
21
Views
5K
  • · Replies 37 ·
2
Replies
37
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
425
  • · Replies 32 ·
2
Replies
32
Views
5K
  • · Replies 37 ·
2
Replies
37
Views
6K
Replies
20
Views
2K
Replies
4
Views
2K
Replies
21
Views
5K