Fuel fitting sealant

[TJay 1041]

What are you guys using on the threads of fuel fittings, In the Fiberglass tank, and also the aluminum header tank?

[EDMO 1078]

Kitplanes mag just came and there is an article about sealants in it, including firewalls.    Leni says Permatex Aviation #3 for fg tanks.  I like Loctite 545 for other fittings and bolt threads - most any of the medium strength threadlockers and the hydraulic sealers will do - you don't have to use heat to remove them.    EDMO 

Edited 24 Mar 2016 by EDMO

[Fly-n-Low 181]

Several wraps of teflon pipe tape.

[gregpro50 64]

Several wraps of teflon pipe tape.

I was always taught tape was bad.  The last thing you need is a chunk of that stuff floating through a fuel line potentially clogging things up.

[gregpro50 64]

This is the stuff I've always used.

http://www.permatex.com/products-2/product-categories/thread-compounds/thread-sealants/permatex-high-performance-thread-sealant-detail

[EDMO 1078]

Several wraps of teflon pipe tape.

Tape is considered bad mostly because it is misused - Never put tape or sealant on the first two threads.  When a fitting is removed, the fitting can have tiny strands of tape sticking to it, or left in internal threads, which can get re-introduced into the system and will stick in valves, clog filters, cause leaks, etc.    EDMO

Edited 24 Mar 2016 by EDMO

[Fly-n-Low 181]

Been using it for years like Edmo said.

[Fly-n-Low 181]

This is the stuff I've always used.

http://www.permatex.com/products-2/product-categories/thread-compounds/thread-sealants/permatex-high-performance-thread-sealant-detail

I am sure that works. Too much of anything can be bad.