X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 06 Jul 2012 10:50:57 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-spurfowl.atl.sa.earthlink.net ([209.86.89.66] verified) by logan.com (CommuniGate Pro SMTP 5.4.6) with ESMTP id 5640432 for lml@lancaironline.net; Fri, 06 Jul 2012 09:19:30 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.66; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=nDITve5Nh4Qlsg1khFI/NhyT9wkmLqxZIs0JxBqO/y1SD+5iOsXtVOzke52ljxbq; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [70.16.215.81] (helo=[192.168.1.24]) by elasmtp-spurfowl.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1Sn8Qm-0003CP-VQ for lml@lancaironline.net; Fri, 06 Jul 2012 09:18:45 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-470-348788112 Subject: Re: [LML] Re: Sealer, Tank and top ready for bond X-Original-Date: Fri, 6 Jul 2012 09:18:44 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da9402acb18533ffd434b9d695310176be038350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 70.16.215.81 --Apple-Mail-470-348788112 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Highlighting the pinhole problem. The guy that sold me my project left = his wings open for months after putting the gray sealer in the tanks. = He said that every time someone came by to see the project he would ask = them to look through the entire tanks and see if they could find any = pinholes. He would fill them and then repeat. Until no one could = find anything. So far no leaks in my airplane.... On Jul 6, 2012, at 12:36 AM, Frederick Moreno wrote: I used the same stuff on my early Lancair IV. I think it was the = recommended PRC product. Probably top of the line, but I know that to = do both wings took four of us in gas masks several hours, and painting = the stuff on with brushes was a real bitch. Patchwork w as required = because after many minutes, sometimes a bubble would emerge, break, and = leave a pin hole connecting with the honeycomb core, probably because = the room got warmer as the day went on. So a second pass was required = to fill pin holes. What a bitch. =20 Still there was a leak in a hidden corner I had to track down. The = stuff is a nightmare to work with, and really hard to daub into the = three wall corners without leaving a tiny gap in the corner which is = where the leak is most likely. If it did it again, I would not use a = brush in the corners, but somehow pump it in and apply via a nozzle on = the end of a flexible tube. Then I would start brushing out the excess = pumped into the corner, and work from there. =20 I was asked by another builder which epoxy is the best to use in tanks. = I don't know, but getting some sound data and as clear recommendation = would be valuable for the entire composite community. Forget PRC if = there is a known reliable epoxy, readily available, with a proven track = record. Sure would be great if West Epoxy, dyed to permit visual = inspection, did the job. It is so widely used in boats that some = research with the West folks might be worthwhile.=20 =20 Fred Moreno, still wincing at the thought of sealing another fuel tank. =20 =20 =20 =20 -------Original Message------- =20 From: George Shattuck Date: 6/07/2012 3:45:27 AM To: lml@lancaironline.net Subject: [LML] Sealer, Tank and top ready for bond =20 I have posted these previously but at least it is, again, what has = worked for me. This sealer was very toxic, requiring a carbon breather = mask when applying it. =20 George Shattuck LNC2, 1994 to 2012, 1500 hr.+/- Note: To protect against computer viruses, e-mail programs may prevent = sending or receiving certain types of file attachments. Check your = e-mail security settings to determine how attachments are handled. =20 --Apple-Mail-470-348788112 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Highlighting the pinhole problem.   The guy = that sold me my project left his wings open for months after putting the = gray sealer in the tanks.   He said that every time someone came by = to see the project he would ask them to look through the entire tanks = and see if they could find any pinholes.   He would fill them and = then repeat.   Until no one could find = anything.

So far no leaks in my = airplane....

On Jul 6, 2012, at 12:36 AM, = Frederick Moreno wrote:

I used = the same stuff on my early Lancair IV. I think it was the recommended = PRC product.  Probably top of the line, but I know that to do = both wings took four of us in gas masks several hours, and painting = the stuff on with brushes was a real bitch.  Patchwork w as = required because after many minutes, sometimes a bubble would emerge, = break, and  leave a pin hole connecting with the honeycomb core, = probably because the room got warmer as the day went on.  So a = second pass was required to fill pin holes.  What a = bitch.
 
Still there was a leak in a = hidden corner I had to track down.  The stuff is a nightmare = to work with, and really hard to daub into the three wall corners = without leaving a tiny gap in the corner which is where the leak is most = likely.  If it did it again, I would not use a brush in the = corners, but somehow pump it in and apply via a nozzle on the end of a = flexible tube.  Then I would start brushing out the excess pumped = into the corner, and work from there.
 
I was = asked by another builder which epoxy is the best to use in tanks.  = I  don't know, but getting  some sound data and as clear = recommendation would be valuable for the entire composite = community.   Forget PRC if there is a known reliable epoxy, = readily available, with a proven track record.  Sure would be great = if West Epoxy, dyed to permit visual inspection, did the job.  = It is so widely used in boats that some research with the West folks = might be worthwhile. 
 
Fred Moreno, still = wincing at the thought of sealing another fuel = tank.
 
 
 <= /div>
 
 George Shattuck
Date: 6/07/2012 3:45:27 = AM
Subject: [LML] Sealer, Tank and top = ready for bond
 
I have posted these previously but at least it is, again, = what has worked for me.  This sealer was very toxic, requiring a = carbon breather mask when applying it.
 
George Shattuck
LNC2, 1994 to 2012, 1500 = hr.+/-


Note: To protect against computer = viruses, e-mail programs may prevent sending or receiving certain types = of file attachments.  Check your e-mail security settings to = determine how attachments are = handled.
 
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