Using Plumber's grease (silicone based) on PCP o-rings

[CZ-Sniper]

Should PCP o-rings have a tiny amount of silicone -based plumber's greased applied to them every few hundred shots or so?

[Ace]

use Dow-33 or 55 on O-rings

[Gippeto]

If you are asking whether you should disassemble to grease orings as part of maintenance...no. Each time you reassemble...yes.

I use silicone brake grease or dielectric grease...silicone plumbers grease will be fine.

Dow 55 has a component to it that swells orings...otherwise nice stuff if a bit thin IMO.

Al

[Daryl]

This is what I use after changing O rings. Seems to work well.
It is a Dielectric PTFE grease. Syncolon by name.
I also use it on the fill probe O rings that some guns have.

[lauchlin]

I use plumbers or diving grease and i would follow what Gippeto Said .....

[CZ-Sniper]

Thank you all very much. So on a new PCP, it is unnecessary to lubricate the o-rings, and the only time we apply grease is when we swap them for new ones down the line. Good to know, thank you!