I use Loctite 545 thread sealant. But the gasoila is good stuff too. I've seen gasoila at tractor supply.

 

Not true.
I have used for years on my boat for the fuel connections. It seals better and does not cause Teflon tape related issues. FYI, I tried to use Teflon tape on the fuel pump during my engine R&R two weeks ago. You can guess what happened to that pump! Now I have a brand new fuel pump sealed with Rector seal and working great.

 

Rector no. 5 is a watery paste and simply does not perform well in diesel/fuel service. I would only use it as a LAST resort and would expect it to weep/leak.

Telfon tape is 100% acceptable, but is very often used incorrectly. If pieces of tape go downstream into your fuel system, you did not use it correctly....

There is no place in, on or before the fuel pump on a stock system that uses any kind of thread sealant. I'm curious how Teflon tape ended up in pump and how that diagnosis was made?

The best option for fuel system thread sealant is easily the anaerobic Loctite 545. You can read up on it and understand why.

If you like telfon paste/thread dope - the gasoila (blue writing?) is waaaay more viscous than rectum seal and performs much better.

 

Not bad at all, Rider... Way to go.👍... You do a DIY system or ? I ran the 1st Gen WVODesigns pump that worked great for the 4yr. Welded up a box that looked like a construction box fit in the bed and encapsulated everything within....pump, filter, greasecar tank and regulator..etc, anywho, think, if I end up fulltime in AZ, ill build another system

 

I see others picked up the slack and answered your Gasoila question- thanks, guys!

My following is a little erratic, I had a small relapse- I wasn't ignoring your question

Gasoila is often recommended in these circles. Think the first I heard of it was in one of the writeups, maybe the one for adding fuel pressure sensors to the fuel bowl?

I bought a small can of it and keep it in the garage. Thought I had the order info here but can't put my hands on it at the moment.

 

Wanting to get the tank setup pronto I called local parts stores. I ended up getting talked into "Permatex Thread Sealant with PTFE" although I haven't used it yet. Anyone used this stuff and is it ok?

 

The tape did not end up in the pump. The pump was cracked in an attempt to get a good seal with Teflon tape. I have not had any issues with Rector seal. No need to risk over tightened any fittings. No issues with SS fitting galling. I have some Loctite 567 that I'm testing, it might work better. Why fix what is not broken? We need to seal NPT fittings for other applications. Teflon is good because it is inert. Teflon tape is not so good, it gets into things, lots of rework, and failures to seal.

 

My WVO system is a DIY. I used a AirDog Raptor pump and a WVO Designs heated filter head. I also ran aluminum fuel line inside the heater hoses. It's been working great for 65k miles now. The crowds at truck pull get a kick out of the exhaust smell.

 

Very similar to rector no 5. It will work.

One reason Loctite 545 is better is that it does not 'set up' and send anything harmful downstream. It is designed for high pressure vibration prone fittings in debris-sensitive hydraulic systems.

Overkill is under-rated. I've used this stuff exclusively doing veggie conversions for several years. It's ideal for all fuel system NPT stuff. I still use gasoila on larger fittings like cooling system connections.

 

Rectorseal jar says it's safe for fuel oils

 

It will work. There are just better products out there for those looking for 'the best'.

With any of these products, avoid application to the first couple of threads to mitigate contamination of your fuel system. The Loctite 545 is very forgiving since if it does go into fuel/etc it dissolves and poses no threat to pumps/filters/etc.

IMHO, the Gasoila sealant is better than Rector products (Retcor 'blue??' is OK - its for high vibration applications IIRC?) because it is more viscous. Having used this and Rector No.5 side by side, I can say undoubtedly the Gasoila seals better in diesel (and hot WVO) service. Loctite 545 is even better.

 

This is what the pipe fitters used on our stationary generators and I can confirm it gets hard even though the label says it stays flexible. It does work but the Rectorseal T plus 2 sealant that does not set up does not include fuel oil on its label but "industrial gasses".

I think the sealant that SkySkiJason recommends would be better than the Tru-Blue because it does not get hard and brittle. Once toe Tru-Blue sets up it is very hard to get the piping apart if a part needs replacing.

My $.02.