X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 12 Apr 2008 10:41:24 -0400 Message-ID: X-Original-Return-Path: Received: from mta10.adelphia.net ([68.168.78.202] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTP id 2844522 for lml@lancaironline.net; Sat, 12 Apr 2008 07:53:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=68.168.78.202; envelope-from=glcasey@adelphia.net Received: from [76.89.163.133] by mta10.adelphia.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20080412115303.RYKO7569.mta10.adelphia.net@[76.89.163.133]> for ; Sat, 12 Apr 2008 07:53:03 -0400 Mime-Version: 1.0 (Apple Message framework v753) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-76--86808136 X-Original-Message-Id: From: Gary Casey Subject: Re: Hysol shelf life X-Original-Date: Sat, 12 Apr 2008 04:52:22 -0700 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.753) --Apple-Mail-76--86808136 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed I'm certainly not a composites expert, but an expert once told me that the best way to test shelf life was to mix up a batch and test the cure - if it fully cures then it is okay to use. Also, shelf life can be extended dramatically by storing at low temperature. I kept mine in the refrigerator for a couple of years or more. Some epoxies can be stored below freezing, but I'm not sure about Hysol. You can be much more confident if the containers have never been opened, as one enemy is moisture absorption. If it were me and it had never been stored at temperatures significantly above room temp I would use it, but then I'm not an expert, so the conservative thing to do is throw it away. Gary Casey On Apr 12, 2008, at 3:00 AM, Lancair Mailing List wrote: > > > I'm getting ready to bond the new skin on my Horizontal > Stabilizer. I plan to use Hysol because I'm not the fastest goo > spreader out there- I want to take some time and get things right > before it kicks off. > > I see that the Hysol I got with my kit is now exactly one year > old, to the day. The data sheet on the Henkel website https:// > tds.us.henkel.com//NA/UT/HNAUTTDS.nsf/web/ > 8C07DFC72FD5EC208525715C001BD343/$File/Hysol_EA_9360-EN.pdf says > six months shelf life at room temperature. The Aerocraft catalog > says a year. > > My question is: what have others done? Given the cost of the > project overall I think I'll order up some new and use the old for > non-critical areas. Am I being overly cautious? Any opinions > received will be just that- what I do is ultimately my own decision. > > Thanks- Bill Wade IV-P > --Apple-Mail-76--86808136 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 I'm certainly not a composites expert, but an expert once told me that = the best way to test shelf life was to mix up a batch and test the cure = - if it fully cures then it is okay to use. =A0Also, shelf life can be = extended dramatically by storing at low temperature. =A0I kept mine in = the refrigerator for a couple of years or more. =A0Some epoxies can be = stored below freezing, but I'm not sure about Hysol. =A0You can be much = more confident if the containers have never been opened, as one enemy is = moisture absorption.
If it were me and it had never been stored at = temperatures significantly above room temp I would use it, but then I'm = not an expert, so the conservative thing to do is throw it = away.
Gary Casey

On Apr 12, 2008, at 3:00 = AM, Lancair Mailing List wrote:


=A0I'm getting ready to bond the = new skin on my Horizontal Stabilizer. I plan to use Hysol because I'm = not the fastest goo spreader out there- I want to take some time and get = things right before it kicks off.

=A0I see that the Hysol I got = with my kit is now exactly one year old, to the day. The data sheet on = the Henkel website https://tds.us.henkel.com//NA= /UT/HNAUTTDS.nsf/web/8C07DFC72FD5EC208525715C001BD343/$File/Hysol_EA_9360-= EN.pdf says six months shelf life at room temperature. The Aerocraft = catalog says a year.
=A0My question is: what have = others done? Given the cost of the project overall I think I'll order up = some new and use the old for non-critical areas. Am I being overly = cautious? Any opinions received will be just that- what I do is = ultimately my own decision.

=A0Thanks-=A0 Bill Wade=A0 IV-P=A0