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Old 09-26-2008, 10:36 PM
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Best sealant for threaded connections?

Just wondering what you guys have had the best luck with when sealing the following threaded connections: Water, oil, fuel and brake fittings.
Thanks, Ken

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Last edited by 406 bug; 09-26-2008 at 10:42 PM.
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Old 09-27-2008, 06:29 AM
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Permatex Aviation Form-A-Gasket, P/N 80019. You should 't need/use anything on a brake fitting.
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Old 09-27-2008, 08:25 AM
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Permatex "the right stuff" Marine grade will seal them all. If you need brake line sealant remake the line "flare" or replace the block, too much pressure.
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Old 09-27-2008, 12:10 PM
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Quote:
Originally Posted by OHD
Permatex "the right stuff" Marine grade will seal them all. If you need brake line sealant remake the line "flare" or replace the block, too much pressure.

Regarding the brake fittings, its the npt fittings (for instance on the calipers).
Wilwood uses some sort of redish looking stuff.

Thanks for the help. Ken
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Old 09-27-2008, 12:58 PM
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On brake fittings, do not use any kind of telflon tape or paste. even the most careful application can let chunks of teflon pull off and make their way into the lines. The last thing you need is a big chunk of teflon clogging up something at the wrong time.

Most of the smaller NPT fittings like a brake line would use can be sealed without anything. Wilwood puts that red stuff on as a way to make it fool proof. Its an elastomer stuff that won't tear or leak or be dissolved by brake fluid. You would have to contact them for what it is.

As for the others, its depends on the fitting. For any NPT fitting you can use teflon (I prefer the paste) on water fittings. You can use it on fuel fittings as well, but make sure you have access to both sides of the fitting so you can clean out any that squished out before letting the gasoline do it for you.

Flare fittings require that you use nothing. The threads don't seal anything, the threads merely pull the flared sections together. putting sealant on the threads just increases the risk of stripping the threads Just use a little drop of oil.
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Old 09-27-2008, 01:16 PM
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Flare fittings require that you use nothing.

I have always used line wrenches, but some guys are stronger than me...
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Old 09-27-2008, 03:29 PM
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Quote:
Originally Posted by 406 bug
Regarding the brake fittings, its the npt fittings (for instance on the calipers).
Wilwood uses some sort of redish looking stuff.

Thanks for the help. Ken
It may be a lubricant to keep threads from gauling. No sealant on brakes. Double flares will never leak if done properly.

Chet
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Old 09-27-2008, 10:31 PM
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Quote:
Double flares will never leak if done properly.
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