"Michael Koblic" writes:

1) How does a $14-threadlocker differ from a $2 Superglue? I gather the
threadlockers are anaerobic. Does that mean that superglue is aerobic?

Cyanoacrylate (super glue) sets on contact with water vapour in the air
(or on your skin, if applied there). It's stored in a container that is
sealed to prevent contact with the air.

Threadlockers are weird plastics that remain liquid as long as they are
in contact with oxygen. They are stored in bottles that are permeable
to oxygen, and which have a significant air space above the liquid.
They set only when you isolate them from oxygen, such as in the space
between a bolt and nut thread.

Dave