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

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

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CZ-Sniper

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

Posted: Fri Apr 21, 2023 9:48 am

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Joined: Sun Mar 19, 2006 1:48 am
Posts: 1176
Location: WMU 73, Ontario

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

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Ace

Post subject: Re: Using Plumber's grease (silicone based) on PCP o-rings

Posted: Fri Apr 21, 2023 10:07 am

Joined: Mon Feb 11, 2013 12:46 am
Posts: 5715

use Dow-33 or 55 on O-rings :wink:

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Gippeto

Post subject: Re: Using Plumber's grease (silicone based) on PCP o-rings

Posted: Fri Apr 21, 2023 11:29 am

Joined: Tue Jun 03, 2008 5:46 pm
Posts: 3009
Location: Canada

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

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Daryl

Post subject: Re: Using Plumber's grease (silicone based) on PCP o-rings

Posted: Fri Apr 21, 2023 12:09 pm

Joined: Wed Jan 05, 2011 12:35 pm
Posts: 11369
Location: P.G. B.C.

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.

Attachments:

Syncolon Grease.jpeg [ 17.8 KiB | Viewed 519 times ]

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lauchlin

Post subject: Re: Using Plumber's grease (silicone based) on PCP o-rings

Posted: Fri Apr 21, 2023 12:17 pm

Joined: Thu Oct 13, 2005 6:52 pm
Posts: 8872
Location: Vancouver Island BC

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

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CZ-Sniper

Post subject: Re: Using Plumber's grease (silicone based) on PCP o-rings

Posted: Fri Apr 21, 2023 2:02 pm

Supporting Member 2009

Joined: Sun Mar 19, 2006 1:48 am
Posts: 1176
Location: WMU 73, Ontario

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!

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