Just curious as to what everyone uses for sealant on their pipe threads. I have used teflon tape for years but have been using more "sealant in a tube" from loctite or permatex lately.

Interestingly, The directions from a Holley fuel pump says use "NO" sealant on the pipe threads at all.

What is the concensus?

i have always used liquid teflon.

Teflon paste and thread are actually not sealants. They are used to allow the joints to be tightened more, hence the teflon. The taper of the thread is what is suppose to seal the joint.

Alot of shops use Locktite products as the dry well and actually do seal the space in the joints.

to prevent "galling", very true ,especially when using aluminium a-n fittings.

Then would grease or anti-sieze provide an equivlant result?

Why not use the "yellow" Teflon tape made specifically for threaded fuel connections? Any decent parts house stocks it and it will not leak!

Teflon tape is not allowed in my shop. It can reduce the friction so much that the fitting still feels loose. In the case of an intake it is easy for the taper to crack the boss on the manifold. If the intaller is not carefull to start the tape after the first thread you will find loose bits of the tape in the fluid. Learned this the hard way years ago when it plugged a carb jet. We use Loctite PST or hydraulic sealent.

Properly applied the tape is fine to many use to much two layers is all that is needed, I in turn have had several bad experiences using liquids sealers where it got into places it should have. Check the links below in the long run the yellow will save you grief, I have used it for 20 some odd years with -0- problems.

http://209.85.165.104/search?q=cache...ient=firefox-a

http://www.newequipment.com/303/Prod...flon_Tape.aspx

Anyone ever use the sealant that GM has for head bolts? I found that stuff to work really well.

I really like a product called leaklock (I believe its called,don't have it in front of me) It is a light blue color and is basically a cross between thread sealer and loctite. If you have a fitting that is not quite tight enough, but won't make another turn, this stuff works great. Once it sets up, the fitting will not move. Also use Rector seal, it is very similar to the above.
Definetely no teflon tape on fuel lines!!!