Liquid teflon or tape?

CMcAllister · 05-06-2021, 11:11 PM

I prefer tape. Neater. And I can control the thickness.

John Dinkel · 05-07-2021, 10:00 AM

I like tape.

SSDiv6 · 05-07-2021, 01:46 PM

In the aviation world, the use of Teflon tape is prohibited due to the potential of the tape deteriorating and slivers getting into the fuel, hydraulic or other systems.

Since AN fittings do not seal at the threads, but rather at the flare, mechanically, metal-to-metal, there is no need to use sealant on the flare end.

The only time you need to use sealant is on any fittings with pipe threads. The proper process to use the liquid Teflon sealant is to apply a single bead all around the thread, keeping it away from the first two threads and the end of the fitting. A good indication that just enough sealant has been applied is when a small amount of sealant has been pushed out of the fitting all the way around the threads.

The best fitting sealants that I recommend are Permatex 59235 and Loctite 567. They are fuel, oil and ethanol resistant and great with high pressure plumbing such as brake caliper fittings.

quickford1 · 05-07-2021, 03:07 PM

Bingo

KRatcliff · 05-07-2021, 03:13 PM

It is easy for me to tell when I put the tape on backwards. A little harder with the liquid.

SSDiv6 · 05-07-2021, 03:18 PM

Quote:

Originally Posted by KRatcliff

It is easy for me to tell when I put the tape on backwards. A little harder with the liquid.

LOL! Are we talking about liquid Spirits?

Jim Caughlin · 05-07-2021, 06:14 PM

Quote:

Originally Posted by KRatcliff

It is easy for me to tell when I put the tape on backwards. A little harder with the liquid.

righty tighty, lefty loosey?

e vassar · 05-08-2021, 10:40 AM

Yes pipe thread. I went with tape and tightened a little more than I wanted to. But this has been a leak prone area and was tired of fighting it. I also used new fittings. No leaks so far...well actually I worked on "liquid" stuff while I watched Dustin fix it! Im getting pretty good at that...

05-06-2021, 11:11 PM	#1
CMcAllister Senior Member Join Date: Sep 2006 Location: Fulton County, PA Posts: 612 Likes: 16 Liked 916 Times in 257 Posts	Re: Liquid teflon or tape? I prefer tape. Neater. And I can control the thickness.

05-07-2021, 10:00 AM	#2
John Dinkel Senior Member Join Date: Nov 2005 Location: Pinckney, Michigan Posts: 507 Likes: 399 Liked 263 Times in 68 Posts	Re: Liquid teflon or tape? I like tape. __________________ John Dinkel 3295 STK

05-07-2021, 01:46 PM	#3
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,041 Likes: 712 Liked 1,573 Times in 580 Posts	Re: Liquid teflon or tape? In the aviation world, the use of Teflon tape is prohibited due to the potential of the tape deteriorating and slivers getting into the fuel, hydraulic or other systems. Since AN fittings do not seal at the threads, but rather at the flare, mechanically, metal-to-metal, there is no need to use sealant on the flare end. The only time you need to use sealant is on any fittings with pipe threads. The proper process to use the liquid Teflon sealant is to apply a single bead all around the thread, keeping it away from the first two threads and the end of the fitting. A good indication that just enough sealant has been applied is when a small amount of sealant has been pushed out of the fitting all the way around the threads. The best fitting sealants that I recommend are Permatex 59235 and Loctite 567. They are fuel, oil and ethanol resistant and great with high pressure plumbing such as brake caliper fittings.

05-07-2021, 03:07 PM	#4
quickford1 Member Join Date: Aug 2008 Location: Davidson, NC Posts: 269 Likes: 522 Liked 20 Times in 12 Posts	Re: Liquid teflon or tape? Bingo

05-07-2021, 03:13 PM	#5
KRatcliff Senior Member Join Date: Sep 2011 Posts: 763 Likes: 75 Liked 524 Times in 141 Posts	Re: Liquid teflon or tape? It is easy for me to tell when I put the tape on backwards. A little harder with the liquid.

05-08-2021, 10:40 AM	#8
e vassar Member Join Date: Jul 2015 Posts: 380 Likes: 67 Liked 271 Times in 107 Posts	Re: Liquid teflon or tape? Yes pipe thread. I went with tape and tightened a little more than I wanted to. But this has been a leak prone area and was tired of fighting it. I also used new fittings. No leaks so far...well actually I worked on "liquid" stuff while I watched Dustin fix it! Im getting pretty good at that...