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Thread sealant for gasoline. #5317205 01/08/20 09:04 PM
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motor_oil_madman Offline OP
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I finally found some made by permatex It's aviation grade. Part# 80019. Anyways, I've read how you aren't supposed to use Teflon tape on npt fittings for gasoline. I think because a small peice can get into the fuel system, but how does this pasty permatex stuff not get into the system? I mean wrapping with Teflon tape isn't hard to keep a couple threads from the end. Also what about if you need to take a fitting off? How do you clean liquid sealant off?

Last edited by motor_oil_madman; 01/08/20 09:05 PM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317214 01/08/20 09:15 PM
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GMBoy Offline
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Good questions, I have never had the need to use anything on fuel lines. All the one's I've seen relied on a small o-ring or were simply quick connect styles. Even my older vehicles prior to 1970 never leaked or had issues with their regular threaded lines.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317227 01/08/20 09:36 PM
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ledslinger Offline
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Gasoila E-Seal

Re: Thread sealant for gasoline. [Re: GMBoy] #5317247 01/08/20 09:56 PM
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motor_oil_madman Offline OP
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Originally Posted by GMBoy
Good questions, I have never had the need to use anything on fuel lines. All the one's I've seen relied on a small o-ring or were simply quick connect styles. Even my older vehicles prior to 1970 never leaked or had issues with their regular threaded lines.




They make straight threaded fittings with an oring. I think i'd prefer the regular npt style that way I don't have to worry about a little oring getting eaten up one day and leaking.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317248 01/08/20 09:57 PM
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andyd Offline
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I love the stuff. Dab some on the male fitting and wipe of the excess, use a rag.Wait a few minutes until it skins over, then assemble. It has to be scrubbed off your hands. If all else fails read the instructions on the tube. grin2


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317279 01/08/20 11:00 PM
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motor_oil_madman Offline OP
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I need a take a fitting out and put a different size in and I don't it will work if the fitting I wet with gasoline. I guess I could wait for it to evaporate.... Do you pull the old stuff out or do you just add more and fit in on again?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317531 01/09/20 09:06 AM
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andyd Offline
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The stuff is non- hardening, Wipe off the old stuff spread on more, re-make the connection. I have never had any issues using it. In fact I use it any where a bolt passes through or into cast aluminum to stop the bonding


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317580 01/09/20 10:23 AM
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sdowney717 Offline
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http://rectorseal.com/pipe-thread-sealant-chart/
A rectorseal product, chart shows you the number to pick, or even Seal-All. I have used these and they work ok on gasoline.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5317867 01/09/20 03:52 PM
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Yah-Tah-Hey Offline
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Never have seen tapered pipe fitting used on fuel lines. The vehicles I was around when I was a kid used inverted flare fittings. They were reliable if not over tightened.

Re: Thread sealant for gasoline. [Re: Yah-Tah-Hey] #5318307 01/09/20 11:33 PM
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motor_oil_madman Offline OP
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Originally Posted by Yah-Tah-Hey
Never have seen tapered pipe fitting used on fuel lines. The vehicles I was around when I was a kid used inverted flare fittings. They were reliable if not over tightened.


I looked them up on the web. Looks like the male end is npt and the female side is a straight flare fitting? You would think living in Houston I should be able to drive down the street and find the correct fittings. I'm sure fuel fittings are special in some way to handle gasoline. Or is brass brass?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5320079 01/11/20 06:15 PM
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Okay this stuff is goopy and messy. Are you still supposed to apply it a couple threads back away from the end of the fitting cause I couldn't be that precise with it. I just rubbed a thin coat around the threads. It said to apply on both pieces that you're assembling.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5320084 01/11/20 06:17 PM
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It doesn't give any instructions other than let it dry a few minutes before assembling. When can you run gasoline through it?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: ledslinger] #5321288 01/13/20 06:58 AM
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Originally Posted by ledslinger
Gasoila E-Seal


When it says gas they're referring to natural gas I believe. Not gasoline. I made this mistake too buying yellow Teflon tape thinking it was compatible for gasoline.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5321424 01/13/20 10:15 AM
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mk378 Online Content
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https://www.fedprobrands.com/gasoila-e-seal-thread-sealant.html

Quote
Excellent resistance to gasoline, ethanol blended gasoline such as E10 and E85...

Re: Thread sealant for gasoline. [Re: motor_oil_madman] #5321526 01/13/20 12:00 PM
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motor_oil_madman Offline OP
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Mk378 they make all kinds of liquid type sealants, but I haven't found any tape style sealant for gasoline. It's annoying because you have to wait a certain amount of time before you can put fluid through.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

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