What's it for?
It's thread locker...
Next question...
>>57347847
I think it's called locktight or something basically a mild glue that holds the crews in place and stops them wiggling out from vibration
>>57347847
To keep them from loosening due to vibrations which laptops are prone to
>>57347847
Gremlin nut, OP.
You've got some horny toads fucking in your labby.
>>57347847
Nylon coating for better adhesion.
>>57347847
Jewish magic.
>>57347847
the service guys will see if the screw was unscrewed before, like a warranty void protection
>>57347847
loctite blue, which is what you use when you want a bolt to not be able to work itself loose, but still be removable with tools.
NOT to be confused with loctite red, which will leave you with a bolt that is never coming out ever again.