Super flex joint ?

[pullar]

OK just got my 3.5" SF kit on the weekend. Am currently spraying everything with PB Blaster to help with the install, but was wondering what everyone is using for grease for the SF joint in the control arms. I typically use a synthetic grease for all my grease fittings, but was unsure about the SF joint.
So what's everyone using?

 

[CanMan]

Regular joint grease.

Same stuff I use for wheel bearings, ball joints, TRE's, ect..

Have not had a single issue with them. Wear is normal.

Synthetic grease wont hurt it.