What's that red glue/resin around screw heads?

C

CafeConLeche

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In all the cameras I worked on, I noticed there is some kind of red glue/resin around the edge of screw heads (not on the thread). Then when I turn the screw, the glue will break off. I searched around on the web, can't seem to find the exact purpose or name for it. Some say it's a tamper indicator, some say it's thread locking adhesive, some say it's torque strip (to be able to tell if the screw is loss and no longer have the correct torque). But nobody seems to know for sure.

What is the actual name and purpose of that glue. If it's essential the function of the camera, where can I buy it?

Thanks!
 
Usually its purpose is to constraint the screw heads from rotate, in order to mantain the mechanism adjustment.
 
well, it's not red loctite if it is on screws that have to be loosened for maintenance. that would take a heat gun to make it let go. gunsmiths use blue loctite for small maintenance-related screws, red for screws that never should come loose.
 
paulfish4570 said:
well, it's not red loctite if it is on screws that have to be loosened for maintenance. that would take a heat gun to make it let go. gunsmiths use blue loctite for small maintenance-related screws, red for screws that never should come loose.
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Isn't Loctite put on the threads rather than the heads of screws? I was under the impression that Loctite worked when it was in a space without air, but maybe there are different types.

I have occasionally used nail varnish to keep a screw in place after adjustment.
 
On classic cameras I think it would have been shellac. Unless you're in a hurry, I would still recommend that. Easier on the lungs.
 
This is what I have and have seen used on many things...Torque Seal...
Nail Polish will do the same thing...when using nail polish you may have to put more than one coat...
Look here for a free sample...Link...
 
On some electronics, this is also called "warranty paint." It comes off when you unscrew it, thereby notifying the authorized repair shop that you attemped to open up the unit and fix it yourself.
 
Fifty years ago in the military electronics industry it was called Glyptal. I believe this is the name of the company that manufactured it.
 
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