Highly recommended
...
Ref: P229, and like, models - (including my P220R/45)
You would get a vast majority of Sig owners, like myself, including my 2 P229n/r 40's, 1 P229R 9mm, P228n/r 9mm, and P225n/r 9mm, would say "Yes" as all my Sigs get Tetra white gun grease on rails and guides...