1979 hydrobooster lubricant?

[cash]

I purchased remanufactured vacuum booster the directions that came with it say to lubricate, and the diagram shows where to lub but says to check owners manual for type of lub. Can’t find any thing Bendex don't know so they sent me to the reman and they don't get back with me.
I hate to use it like without lub. And I don't want to put something in there that will hurt the rubber or something.
Maybe air tool lub?
Someone out there remembers doing this I hope!
this goes in 1979 f700, booster under cab. single piston single diafram.

 

[cash]

Thanks for the reply I did get on this stupid question. Yes the reply is gone now but it was emailed to me.
Sorry about the title, I was referring to a vacuum booster.
Turns out that the instructions that came with this booster was intended to be for a booster with a leather diaphragm!!! beats all.