Jeff Scott, Its a bit disturbing to know that there is a sealant that is rated for gasoline and even ethanol 10% that breaks down with standard auto fuel. I read the Data Sheets on it and you are correct, as you stated. Not that I use autogas but Im still concerned about fuel leaks and tank contamination. Have you tried the Permatex Aviation sealer. I have not had any issues with it on aviation fuel.
I am curious if you have contacted Rectorseal about their RectorSeal 5 you used ? I live near Ashland Valvoline HQ and my next door neighbor is in their engineering department and we often discuss fuels and lubricants ( oils) and their testing. He has discussed the fuel additives and their tests many times. I will have to ask him about this and see if they have any tests on Rectorseal 5 Jeff York Lexington, KY On Tue, Dec 11, 2018 at 1:44 PM Jeff Scott via KRnet <krnet@list.krnet.org> wrote: > Good question. I use RectorSeal 5 and should have made specific reference > to it. It is rated and recommended for gasoline fuels, including up to 10% > alcohol mixes, but didn't stand up to whatever is mixed in most of the > local fuels here. > > -Jeff Scott > > *Sent:* Tuesday, December 11, 2018 at 11:08 AM > *From:* "Jeff York via KRnet" <krnet@list.krnet.org> > *To:* KRnet <krnet@list.krnet.org> > *Cc:* "Jeff York" <jeffyor...@gmail.com> > *Subject:* Re: KR> Mogas Blues... One last update > Jeff, > > I am curious. You refer to pipe dope several times but I am not sure which > pipe dope you are referring to. > > Is it standard plumbers pipe dope ? Is it teflon based pipe dope ? Or is it > some other pipe dope compound ? > > Im sure you know that there is pipe dope for water, pipe dope for gas and > variations of teflon that is for water or gas. > > I dont run mogas but follow your thread on this because I may want to or > need to some day. Certainly many of us have read that there continues to be > regulatory or other drivers that seek to shut down production of aviation > fuels. Aka , where is AV 80 anymore and 100 may go in that direction. Most > likely not in our lifetimes. But anyway. > > I used a Permatex Aviation sealant rated for aviation fuels on my fuel tank > drains made bu Saf-Air model CAV110 with the Permatex as a thread sealer. > Just replace all four of mine. Two wing tanks, head tank and fuel strainer. > > So, my concern is if Permatex is the pipe dope you are referring to or any > other aviation/fuel rated pipe dope / sealer ? > > Jeff York > Lexington, KY > > On Dec 6, 2018 6:07 PM, "Jeff Scott via KRnet" <krnet@list.krnet.org> > wrote: > > The KRNet has been pretty quiet as of late. Hopefully that means everyone > has been in the shop working on their planes. > > At long last, I have finished rebuilding the tanks in my SuperCub Clone. > Back in October, I posted the issues I had with extensive damage to the > fuel system in my SuperCub Clone with Epoxy Resin tanks. This damage was > from use of alcohol free Mogas that apparently contained other additives > that were incompatible with epoxy resins. I documented on my web site in > gruesome detail the process I used to rebuild these tanks from start to > finish. <http://jeffsplanes.com/Cub/MOGAS/mogas.html> The wings were > removed from the plane. These tanks were gutted out, and built back up > with vinylester resin, then coated with a slosh compound from KBS coatings. > > Additionally, I have had a test running for 5 months now with several local > alcohol free fuels in bottles with samples of Orings, fiberglass, and > fittings with pipe dope in the threads. All but one of the local fuels > damaged the epoxy impregnated fiberglass I tested. However, the quick test > that I discovered was that fuels containing the damaging additive also > dissolved pipe dope out of the threads of pipe fitting on contact. So, a > quick test to see if the fuel is compatible with my fuel system is take a > fitting with pipe dope worked into the threads, and drop it into a test > sample of the fuel and swirl it around. If the fuel is incompatible, the > pipe dope will dissolve as the test sample is gently swirled around. If > the fuel is compatible, nothing happens. The test samples I took 4 months > ago are still soaking, and the fuel from the local Conoco station has still > not dissolved the pipe dope, while the other local fuels dissolved the pipe > dope on contact. > > Now all I need is some decent weather so I can get the SuperCub out for > some play! > > -Jeff Scott > Cherokee Village, AR > > > _______________________________________________ > > _______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
