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Apr 23, 2026 | 04:02 PM

#11

NorthWestern

Club Member

Joined: Apr 2016

Posts: 11,659

Likes: 8,468

From: Inland NW

Quote:

Originally Posted by MURPHCC1

Brake fluid destroys Teflon tape, possibly getting in the the system itself and wreaking havoc in there.

Yeah, I like Leak Lock. If you have access to some, it works on just about everything

Apr 23, 2026 | 04:21 PM

#12

Dan89FLSTC

Seasoned HDF Member

Joined: May 2008

Posts: 21,215

Likes: 12,809

From: South Carolina

As long as the teflon tape is on the threads and not off the end it will be fine.

Apr 23, 2026 | 04:46 PM

#13

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,997

Likes: 8,065

From: poway

Quote:

Originally Posted by MURPHCC1

Brake fluid destroys Teflon tape, possibly getting in the the system itself and wreaking havoc in there.

Got an example?

That is what AI says but if I google thread tape for pipe thread brake fitting I get Teflon tape..

If you look at the first thing AI found for me, you get ...

AI search:

http://www.classic-motorcycle-build....-fittings.html

The guy is trying to seal brake flairs.

What about this? Teflon lined brake line..

https://shop.redline360.com/products...ded-hose-black

One guy says the fillers in Teflon tape causes the issue.. There aren't any fillers.. It's 100% Teflon.

AI does it again.

Apr 25, 2026 | 06:55 AM

#14

98hotrodfatboy

Seasoned HDF Member

Joined: Mar 2010

Posts: 21,168

Likes: 7,676

From: Poolville

As a Steam Fitter A for many years, either is fine.. One needs to remember that Teflon Tape or Dope is primarily a lubricant to help with locking the male and female threads together to prevent leaks..