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Old 11-15-2017, 10:22 AM
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Join Date: Nov 2017
Location: Dallas, Txas
Posts: 61
When to use Gasket Sealants?


Kent at ************** says to use Permaflex Aircraft Sealant on paper and cork. That's what I am doing.

I know not to use gasket sealants on head gaskets but what about other areas of the engine? I am installing my rebuilt turbo this weekend and have several seals that need to go in:

Oil Line Seal
Oil Line Return Seal

Everyone seems to have their opinion on this, I'd rather hear from someone that's been doing this for a while. Do I need to use sealant after prepping both surfaces and installing a brand new gasket?

Last edited by michael_j_brown; 11-18-2017 at 02:16 AM.
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Old 02-03-2018, 07:19 PM
FreddMersaid's Avatar
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Join Date: Nov 2017
Location: Glendora, California
Posts: 68
In my work, I decide by what kind of sealing is needed by what kind of surfaces and gaskets are involved and the condition of the sealing surfaces.
It's a case by case basis with me.
It also depends on if I'm trying to seal (hold back or keep out) Coolant, Oil, Fuel, Air, etc.
Or a wet stud going into one of these fluids ?
Has / is this mating or joining surface corroded or had corrosion ?

Sealants can be Aviation seal, Gasket cinch, Right stuff, RTV silicone, etc.

Are you referring to an "O-ring" seal ?
Or a "shaft seal" ?

And the list can go on and on.

Post some pictures next time of the exact application and installation.
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