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Always Be Fixing Cars
 
Join Date: Nov 2012
Location: SE CT
Posts: 1,473
Dow Molokyte 111 - which rubber parts do not like it?

Hi all

I'm doing a top end on my 964 and plan to use Dow 111 on several of the O-rings. Are there any for which this is a no-go?

For instance: RSR rocker seals, Fuel Injector to rail/manifold O-Rings, Cam seal O-Rings etc etc?

Thanks

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'91 964 C4 - New Daily
'73 Alfa GTV - 90% done 50% to go
'65 912 - Welding in process
Old 02-15-2020, 10:35 AM
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It used to be listed as "food grade" for use on o-rings in contact with foodstuffs. Don't know if that's still true or not.

Looking at the SDS, it's pretty inert and doesn't react with anything.
Old 02-15-2020, 03:34 PM
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This stuff is the gold standard for rubber polymer compounds, including all flourosilicones, conventional silicone, EPDM, TPV/TPE, etc. Use with confidence with any o-rings around the engine/trans/vehicle. Just note that if it smears someplace where you want to paint, you have a major cleaning to do because nothing will adhere to it.
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Old 02-15-2020, 03:36 PM
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Always Be Fixing Cars
 
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Thanks that gives me confidence. I suppose another way of phrasing this question would be - are there any instances where one would want to use something like Curil-T on a rubber seal? I understand the Dow11 lubricates the rubber which likely helps install and longevity but I don't exactly understand what Curil-T would do for O-rings and rubber seals such as valve cover gaskets (964 style) or if it has any place on those.
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'91 964 C4 - New Daily
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'65 912 - Welding in process
Old 02-15-2020, 03:39 PM
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Curl T is more a sealing material than a lubricant. Go with silicone for lube/preservation...
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'87 Carrera (3.4L)
'07 Boxter
Old 02-15-2020, 04:28 PM
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SuperLube is equivalent to Dow 111. Also contains PTFE. I bought a 1 lb. tub from HomeDepot for about $10.

SuperLube vs Dow 111:
https://www.home-barista.com/levers/molykote-111-and-or-super-lube-silicone-lubricating-grease-with-syncolon-and-or-oks-1110-t43995.html

Sherwood

Old 02-15-2020, 10:54 PM
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