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Old 05-30-2009, 12:52 AM
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Red VS Black Silicone?

Hey everyone,

Just wondering what the difference is? I know the red is higher temp but what are the benefits of the black? Its being used for a gasket on a 50/50 water injection system. Methanol and or Ethyl alcohol. Into the plastic intake pipe about 2-3 inches pre-turbo. I would guess the temps couldn't be all that high since the intake material is plastic but thats why I'm asking.

Thanks
Jordon
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Old 05-30-2009, 07:21 AM
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black is o2 sensor safe and safe for use with gas and oil. methanol shouldn't hurt it.. the red is a high temp version, good for higher temps, but I'v never used it, black is all I use
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Old 05-30-2009, 09:47 AM
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Quote:
Originally Posted by xxllmm4
Just wondering what the difference is?
AFAIK, there's no exact industry standard for RTV color to application or properties. The OEM's seem to come up w/different formulations that are then copied by the adhesive/sealant makers.

Use the manufacturer's recommendations as stated on the packaging or tube.

Just color alone says nothing in re what the properties are. For instance, Permatex has "sensor safe" formulas in black, blue and copper, as well as 600-plus degree F in various colors.
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Old 05-30-2009, 11:33 AM
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http://www.efunda.com/designstandard...one&SC=Ethanol

http://www.efunda.com/designstandard...C=Methanol#mat

Compatibility matrix is available in the above webpages, it specifies that silicone is ok for static sealing with ethanol and for both static and dynamic with Methanol.
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