Originally Posted By: Kamele0N
Anything "petrochemical" will swell rubber (dust boots...that rubber on slyding pin etc)
If that is true, then how do tie rod and ball joint boots do well with petrochemical greases?
EDIT: johnnyh55, both SilGlyde and the 3M silicone brake grease are highly regarded here. Silglyde is a castor oil grease with only a trace of silicone content. The 3M product is a true silicone grease. Comparing both under the faucet, real silicone seems to be more resistant to water absorption.
For exterior metal to metal contact points, I prefer either Dow/Honda Molykote77 or Pastelub for their very high moly content and superior water washoff resistance. Just my preference.
Regarding petrochemical greases on brakes, I believe the real concern is getting it into the inner workings of the brake system. I'm going to take a wild guess that the exterior brake bushings and tie rod rubber are both made of EPDM rubber (I might be wrong). Regardless, some here have reported that certain car brands have brake rubber that is extremely sensitive to swelling even with so-called rubber safe brake greases. It's somewhat mind boggling.