From Threadlocker.com
<<<"Threadlockers are designed to lock and seal threaded fasteners.
They perform better than traditional mechanical devices such as lock
washers because they unitize the entire assembly. This prevents any
loosening from shock and vibration.
Threadlockers also alleviate rust-lock and prevents any leakage. There
are a variety of products which are designed for various strengths,
temperature, and remove ability. Liquid threadlockers are considered
to be the MOST effective method of locking and sealing threaded
fasteners">>>
From me: (FWIW)
Use grease if you like to on BB threads, but don't discount the fact
that most liquid threadlocking compounds lubricate (during assembly),
seal and secure the parts involved, which is why they are so widely
used in machine and aerospace applications.
(Many machine and engine parts come with thread locking compounds
prepped on the threads.)
BTW, they won't harm your bike in any way <G> and if you choose the
correct product, it can be disassembled with hand tools and no heat.
Electrolysis is prevented (no seizing of dis-similar metal parts)
(Works better for this than anti-seize compounds in many hostile
environments such as in salt water marine applications and dis-similar
materials.)
Sealing is assured (no water can enter the threads)
The parts won't unscrew because of loostening due to shock
loading and vibration. (This would be the part that the grease doesn't
seem to be able to do very well.)
No "walking" and/or "galling" which usually ends up in seizure.
I'm not sure what the down side could be???
BTW I am only a "Wrench" and am not affiliated with any company
that makes these products. <BG>
I use em' all the time on many different applications, especially
where they are specified by the manufacturer and yes, also on my
bikes.
Nothing to be afraid of ! <G>
Bob..