Purpose of lubrication is to reduce the coefficient of friction of rubber surfaces
Frequently used to facilitate automated assembly, but also may have a functional purpose such as creating a smoother interface between mating parts (rubber vs plastic is especially problematic)
There are two major methods to reduce friction:
PTFE is often found in musical instrument lubrication products; most commonly, valve oil.
PTFE is used in some aerosol lubricant sprays, including in micronized and polarized form. It is notable for its extremely low coefficient of friction, its hydrophobia (which serves to inhibit rust), and for the dry film, it forms after application, which allows it to resist collecting particles that might otherwise form an abrasive paste.