Posted for "John W. Cox" <johnwcox@pacificnw.com>:

 John in the last several days there have been a number of posts which
 skirted a direct answer to your query.  I believe there is not a single DAR
 who would approve a kit built aircraft for flight with the use of "any fuel
 line thread sealant compound".  (Whether that be Locktite 245, Teflon tape,
 or Baker Seal.)
 
 The AC 43-131B on page 8-22, paragraph 8-38 FUEL SYSTEM PRECAUTIONS.
 Subparagraph f.  Do not use Teflon tape on any fuel lines to avoid getting
 tape between the flare and fitting, which can cause fluid leaks.
 
 
 Mike Easley says he uses Teflon tape.
 
 Dan Schaefer N235SP says "he used Baker Seal from ACS"
 
 Charlie K put it best "using anything on flared fittings is not wise".
 
 I wont speculate on what Brent recently said about deviation from a proven
 design but since I am still sensitive over the loss of Chuck Brenner would
 you guys be willing to listen, or go talk to either a DAR or an IA as to the
 above recommended courses of action.
 
 I went to A&P school and got my ticket just to reduce these frequency of
 mods so common. I was taught that there is a defining reason why flare seats
 on aircraft are 37.5 degrees vs. 45 degree automotive style flares and that
 no compound of any source or type is ever used on fuel lines.  Here is my
 answer to your question. NONE!
 
 John Cox A&P