Boron nitride is effectively a man-made substitute for carbon when used in lubricants. It's low co-efficient of friction, high temperature and chemical stability and high thermal conductivity make it good in applications where there are high pressure sliding loads.
Bicycle chains and gears would be just such applications, hence the successes posted above. Zoea, you don't say what it is you are trying to lubricate, so it's difficult to give advice. Tribology, the science and engineering of interacting surfaces in motion (it says on Wiki!) is all about having the right lubricant for the right situation. Sometimes that might mean no separate lubricant!
As Getpip says, if you are after the right lubricants for any RC application, you cannot go wrong with Finish Line. Their Cross Country Synthetic for bearings, this stuff for gears, dry wax for ball joints, they've got it all. If you're not sure which one to use where, you can always ask on here!! HTH
