And there are bunch of different types of materials used for O rings.  
Viton
Nitrile
Neoprene
Silicone
EPR
PTFE
Polyurethane
Rubber

I would stick with silicon grease.  DC-4 is good stuff.  I would never use a 
petroleum product on an O ring or a condom.  

From: Ken Hohhof 
Sent: Tuesday, February 12, 2019 5:22 AM
To: 'AnimalFarm Microwave Users Group' 
Subject: Re: [AFMUG] Lube for Backhaul O-rings?

I’m not sure if you guys are kidding or serious, but petroleum products will 
probably attack the rubber.

 

On something like a Ceragon mount where the O ring doesn’t slide over a tube 
but just presses against the other surface, you’d probably be better off just 
going without lube.  Otherwise, you could use the old photographer’s trick for 
filling scratches – nose oil.

 

https://en.wikipedia.org/wiki/Nasal_sebum

 

 

From: AF <af-boun...@af.afmug.com> On Behalf Of Tim Withrow via AF
Sent: Tuesday, February 12, 2019 5:41 AM
To: af@af.afmug.com
Cc: Tim Withrow <timwith...@aol.com>
Subject: Re: [AFMUG] Lube for Backhaul O-rings?

 

It's one of the things I usually forget but always have a vehicle near, so I 
just pulled the dipstick out and get some oil off it.


--------------------------------------------------------------------------------

On Tuesday, February 12, 2019 Steve Jones <af@af.afmug.com> wrote:

Vaseline is what i use on my pool 

 

On Sun, Feb 10, 2019 at 3:36 PM Bill Prince <part15...@gmail.com> wrote:

  Yeah. That was probably my brain aneurysm acting up. Probably conflated WD40 
and DC4...
   


  --

  bp

  part15sbs{at}gmail{dot}com

   

   

  On Sun, Feb 10, 2019 at 12:30 PM Ken Hohhof <af...@kwisp.com> wrote:

    I think you mean DC4 which is dielectric grease.  The chemical composition 
is probably similar to DC111 but it isn’t as stiff.  DC111 is basically a food 
grade lubricant for rubber valve rings.  I suspect that plumbers grease that 
you buy at a hardware store is similar stuff.  DC111 probably has silica added 
to make it thicker.

     

    If you like the single use packets instead of 5 oz tubes, I think these are 
probably the same thing:

     

    
https://pilotshq.com/dow-corning-molykote-111-oringvalve-lubricant-6gm-dc111-6gm-p-18024.html

     

     

     

    From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince
    Sent: Sunday, February 10, 2019 12:39 PM
    To: AnimalFarm Microwave Users Group <af@af.afmug.com>
    Subject: Re: [AFMUG] Lube for Backhaul O-rings?

     

    I always used DC-40. I bought it at the airplane shop.




    --

    bp

    part15sbs{at}gmail{dot}com

     

     

    On Sun, Feb 10, 2019 at 10:12 AM Jeremy <jeremysmi...@gmail.com> wrote:

      Do you lube the O rings on your licensed antennas?  I have seen some 
where they didn't and the O ring cracks apart, potentially causing water 
ingress.  

       

      Most of the big names include a small pack with the radio or dish.  I am 
struggling to find the exact product.  I have heard people say that you can 
just use Vaseline, but the Internet says the petroleum will eat the rubber o 
ring within about a year.  I see dielectric grease also being reported as being 
used, but it will supposedly also melt the rubber.  

       

      Most are recommending Silicone Grease.  The only silicone grease that I 
can find locally is "100% pure Silicone Grease" that is "Spark Plug Boot 
Grease".  I figure that spark plugs boots are also rubber so this is probably 
the stuff, but it is also listed as being dielectric, and it contains 
polydimethylsiloxane.... whatever that is.

       

      Does anyone have any recommendations for what I should use to lube the 
O-Rings on my licensed backhauls when they do not include a tube of whatever 
they usually include??  Anyone have any stories about things that did not work 
out?

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