Thread locker on fuel tank?

[John_Mc]

Does anyone know if Loctite Blue 242 thread locker is OK to use on fuel systems? I'm replacing the fuel shut off on my generator. It screws into the bottom of the tank. I used to have some thread sealing tape that was approved for fuel system use, but can't find it. I'm hoping the Loctite stuff is OK to use, but nothing on the label mentions gasoline.

 

[Tractor Seabee]

he fine print on the tube should tell if is. Probably need a magnifying glass.

Ron

 

[John_Mc]

he fine print on the tube should tell if is. Probably need a magnifying glass.

It says nothing on the tube about gasoline, one way or the other. I still have the blister pack it came in - nothing on there either. I'm just guessing that this means it's not OK with gas. I'd expect them to brag about it if it were.

 

[TnAndy]

I use this stuff on all fuel related threads. Lowes here carries it. Might try auto parts stores. Comes small squeeze tubes as well.

 

[oosik]

OK - so here I am - 5AM on Turkey Day - reading the fine print on my brand new unopened bottle of Loctite 242 BLUE. It say - designed for metal parts, not plastic (on back of blister pack)

It says for oil pan bolts and valve covers(front of blister pack). If it's OK for use in an oil environment - I would guess it's OK for use in a gasoline environment.

On the back of the blister pack - bottom, left side - - a phone # to call in the USA. 1 860 571 5100

 

[fried1765]

OK - so here I am - 5AM on Turkey Day - reading the fine print on my brand new unopened bottle of Loctite 242 BLUE. It say - designed for metal parts, not plastic (on back of blister pack)

It says for oil pan bolts and valve covers(front of blister pack). If it's OK for use in an oil environment - I would guess it's OK for use in a gasoline environment.

On the back of the blister pack - bottom, left side - - a phone # to call in the USA. 1 860 571 5100

Maybe not!
Gasoline acts as a solvent,...oil not so much.

 

[jaydee325]

If you are trying to seal pipe threads, a thread locker formulated for threaded fasteners is not the right application.

I'd use a teflon based thread sealant. And, use it sparingly keeping it off the first two rows of threads on the fitting.

 

[John_Mc]

On the back of the blister pack - bottom, left side - - a phone # to call in the USA. 1 860 571 5100

I went on their web site and sent a question to customer service two days ago. No answer yet.

 

[WranglerX]

This is pretty much what I use on everything because PTFE tape hates me...



Sorry for hard to read graphic, some day better camera with magnification...

Thread seal tape - Wikipedia

Dale

 

[TractorGuy]

I have used aviation permatex on fuel connections. No leaks but not sure if they will come back apart.

 

[mcfarmall]

Blue loctite is for threaded FASTENERS, not pipe joints. I'm sure Loctite has a product that is meant for sealing pipe joints containing gasoline.

 

[Clint S]

If you look at the product data sheets under product specs is shows on the Loctite page it will tell you that 242 has 95% adhesion strength after 1000 hours for unleaded gasView attachment efa3ab187ce4b5b13a8dd16a7c2b06dc015bc2b8.pdf

 

[John_Mc]

If you look at the product data sheets under product specs is shows on the Loctite page it will tell you that 242 has 95% adhesion strength after 1000 hours for unleaded gasView attachment 580243

That sounds OK until you look at it the other way: It looses 5% of it's adhesion strength after only 1.5 months of exposure to unleaded gas.

 

[Deere Dude]

Blue loctite is for threaded FASTENERS, not pipe joints. I'm sure Loctite has a product that is meant for sealing pipe joints containing gasoline.

I was a pipefitter in a factory and if I want joints to leak, i would use something other than Loctite 242. Don't get me wrong, I used Teflon paste and sometimes tape, but a majority of the time I tried to use 242 because I didn't want to redo joints. I worked on HP grease, paint, air, water and almost anything else.