Today's Message Index:
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1. 07:41 AM - Re: Jeffco (David Weaver)
2. 10:21 AM - Re: Fw: Jeffco Epoxy (David Weaver)
Message 1
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I used about 12 gallons of MEK to remove what was left of the original seal
er that was literally washed out from the use of 87 octane fuel with ethano
l.- I contacted various sources-for obtaining straight ethanol to work
with and found none willing to sell small quantity of pure ethanol.- I us
ed scotch brite pads wired to a pole to scrub the inside of tank (pouring M
EK into horizontal wing tank) while working outside wearing respirator and
protective gear to protect eyes and skin from the extremely toxic MEK.- I
t is a bit of a daunting task to keep the MEK out of contact with the finis
h paint on the wing....I managed to do so.- I worked as quickly as possib
le by pouring in approximately a quart of MEK, scrubbing and then dumping u
ntil I got the job done.- The MEK is very harsh on the interior room temp
erature cured glass tank coating...so speed is of completing job is very im
portant.- Jeffco is much easier to apply and was less expensive compared
to PR1750 (it has very good wicking properties on a clean surface.- It d
oes require two coats as gas release during curing causes pin hole formatio
n.- Last I checked, Lance Air was found to have a long history of using J
effco and that was good enough for me.- As I mentioned earlier, one has a
ppreciate the limitations of the product.- That is why there are some app
lications where I would consider using a polysulfide in addition to Jeffco
(coating over Jeffco) to bridge transition areas from composite structure t
o aluminum.=0ADave Weaver N912GR=0A =0A=0A________________________________
=0A From: Bernard Wilder <bernard.wilder2@gmail.com>=0ATo: Pulsar Net <puls
ar-list@matronics.com> =0ASent: Friday, September 6, 2013 7:54 AM=0ASubject
ard Wilder <bernard.wilder2@gmail.com>=0A=0ADave,=0A=0AThanks for your repl
y.- Helps a lot.=0A=0AOne more question:- How well. if at all,- did
you have to remove the=0Acoating that Aero Designs originally used to seal
the tanks ? ? ?=0A=0ABernie=0A=0AOn Thu, Sep 5, 2013 at 9:18 PM, David Weav
er <mortweaver@sbcglobal.net> wrote:=0A> Yes I have only used 100LL one tim
e while on a long trip out to western=0A> Kansas from Illinois.- I use 87
Octane with up to 10% ethanol.- I currently=0A> have 343 hours on 912UL
Rotax engine.- At 5100 RPM cruise is 140 MPH and at=0A> 5500 RPM cruise i
s 150 MPH (tricycle gear/large wheel option and 145 lb=0A> pilot).- Prope
ller is GSC controllable pitch hub with Warp Drive blades.=0A> The auto fue
l burns very clean with no fouling of spark plugs or carb=0A> malfunction.
- As I mentioned earlier, where there is a transition between=0A> dissimi
lar materials, I would coat that area with a polysulfide fuel sealer=0A> an
d not count on Jeffco as it is brittle.- The polysulfide material can be
=0A> applied over Jeffco.- Jeffco- can not be applied over a polysulfid
e coating=0A> as it will crinkle and peal away.- It is a good idea to per
iodically use an=0A> inspection mirror to inspect the areas inside the wing
tank at the fuel=0A> filler ring and the aluminum vent tube for hair line
cracks (if Jeffco is=0A> primary sealer in use).=0A> Regards - Dave=0A>=0A>
From: Bernard Wilder <bernard.wilder2@gmail.com>=0A> To: Pulsar Net <pulsa
r-list@matronics.com>=0A> Sent: Thursday, September 5, 2013 3:58 PM=0A> Sub
rnard Wilder=0A> <bernard.wilder2@gmail.com>=0A>=0A> Dave,=0A>=0A> Have you
been using gas with 10% ethenol ? ? ?=0A>=0A> Bernie Wilder=0A>=0A> On Thu
, Sep 5, 2013 at 11:25 AM, David Weaver <mortweaver@sbcglobal.net>=0A> wrot
e:=0A>> My Pulsar XP wing tanks were resealed with Jeffco many years back a
fter=0A>> removing the remanants of what was left over from the original se
aler=0A>> shipped with the Aero Designs wing kit.- There has been no evid
ence of=0A>> degradation of the Jeffco with the exception of the fuel fille
r transition=0A>> area from composite to aluminum filler ring.- That area
was treated with=0A>> the=0A>> more flexible polysulfide close out plate s
ealer.- The specs for Jeffco=0A>> are=0A>> available on-line.- It is an
industrial tank sealer that is rated for even=0A>> acid exposure.=0A>> Dav
e Weaver- N912GR=0A>>=0A>> From: Bernard Wilder <bernard.wilder2@gmail.co
m>=0A>> To: Pulsar Net <pulsar-list@matronics.com>=0A>> Sent: Thursday, Sep
tember 5, 2013 9:40 AM=0A>> Subject: Pulsar-List: Jeffco=0A>>=0A>> --> Puls
ar-List message posted by: Bernard Wilder=0A>> <bernard.wilder2@gmail.com>
=0A>>=0A>> Asked Aircraft Spruce if Jeffco was impervious to ethenol.=0A>>
=0A>> Response:=0A>>=0A>> I don't know. Will check with our=0A>> ===
=====================http://www.m
atronics.com/Navigator?Pulp; -->=0A>> http:==========
===============0A>> http://www.matronics.co=
=================/=0A>>=0A>>=0A>>=0A>>=0A
>>=0A>>=0A>>=0A>>http://forums.matronics/- - - - - - - -
- -  tronics.com/contribution"=0A>> target="_blank">http://www.ma
tronics.com/contri=================0A>=0A>
========================
Message 2
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| Subject: | Re: Fwd: Jeffco Epoxy |
A few years back I tested a small piece of aluminum plate coated with Jeffc
o by sealing it up in a canning jar submerged in gasoline with ethanol for
a few months.- Looking at it later under a magnifying glass there was no
visable degradation of the coating.- What I have read about its industria
l application for being resistant to acids would suggest that it is very ne
ar if not chemically inert.- It was nearly four years ago when I first us
ed it in my wing tanks as the primary sealer.- It spreads on application
like an epoxy floor sealer...very easy to brush out.=0ADave Weaver=0A =0A
=0A________________________________=0A From: Bernard Wilder <bernard.wilder
2@gmail.com>=0ATo: Pulsar Net <pulsar-list@matronics.com> =0ASent: Saturday
, September 7, 2013 7:46 AM=0ASubject: Pulsar-List: Fwd: Jeffco Epoxy=0A
ail.com>=0A=0AHI- Guys & Gals,,,,,,=0A=0AFYI from Aircraft Spruce. Is thi
s a CYA from Jeffco ? ? ? ? ?=0A=0ABernie=0A=0A=0A---------- Forwarded mess
age ----------=0AFrom: Josh Solis <joshsolis@aircraftspruce.com>=0ADate: Fr
i, Sep 6, 2013 at 7:25 PM=0ASubject: Jeffco Epoxy=0ATo: bernard.wilder2.com
=0A=0A=0AHi Bernard,=0AThe manufacturer has not tested the material to see
how well it works=0Awith ethanol, so they do not recommend using it for par
ts that are in=0Aconstant contact with fuel or any material with ethanol in
it. We do=0Aoffer a Jeffco epoxy tank sealer that seems to work well, p/n
=0A09-42226. It is not a laminating epoxy, just a sealer, so the part is=0A
made with a laminating epoxy, then the sealer is brushed on to protect=0Ath
e part from the fuel and additives. I hope this helps.=0ARegards,=0AJosh So
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