Thread sealing on fuel lines

[saltyrob]

Hi Folks,

I am about to start replacing the fuel lines from our new diesel tank to the 18 hp engine ,and this will include threaded components.Looking at the internet it appears that Virgin White thread sealant , which I believe is PTFE paste, is ok to use with oil,petroleum lines. Can anyone advise if this is indeed ok or if there is a better product


Many thanks

Rob

 

[David2452]

Probably plenty good enough, as an alternative I like Clessetite, designed for LPG but fine with all hydrocarbons and can be pressure tested straight away. I even use a small drop in the threads (not pipe or olive) of compression fittings as I find the lubrication quality makes for a more controlled tightening of the nut. Used it on all heater diesel fuel supplies for a long time and never had an issue either under vacuum or pressure test.

 

[superheat6k]

I find Loctite 577 excellent for pipe sealing. Used it on my diesel fuel system upgrade this winter and no leaks for approx 30 joints.

 

[MoodySabre]

I went to a local hydraulics supply firm who sold their own non-branded sealant.

 

[Contest1]

PTFE tape will do the job.

 

[Pete735]

Another vote for Loctite 577, have used it on 2 boats and never had a problem, not as many as 30 joints though!

 

[stav]

Recently changed my fuel lines and added extra bits and I used hylomar ultimate blue. No leaks except for the two connections I only did hand tight. I did have some clessetite but concerned about the ptfe and still not sure if diesel affects this or not.

Good luck with it.

http://www.hylomar.co.uk/index.php?option=com_content&view=article&id=62&Itemid=70

 

[KellysEye]

PTFE tape is deigned for water connections and it won't stop diesel leaks. There is a diesel connection sealant, any lorry factor or perhaps Halfords sell it. It comes in a black squeezy pack.

 

[CET1]

Used hylomar blue on our fuel line connections after years of problems with small leaks. No further problems 2 years down the line
For info look at hylomar.co.uk web site.

 

[John_Clarke]

Another vote for Loctite 577. It sealed a compression fitting with a damaged olive.

 

[cimo]

the safety data sheet classifies hylomar as a cat2 carcinogenic.

http://www.hylomar.co.uk/index.php?option=com_docman&Itemid=76

 

[Contest1]

PTFE tape is deigned for water connections and it won't stop diesel leaks. There is a diesel connection sealant, any lorry factor or perhaps Halfords sell it. It comes in a black squeezy pack.

I,v used Ptfe tape to seal threaded joints in water, steam and diesel pipes. Never any problems.
There is some cheap and very thin tape on on the market thats best avoided.