Re: [bolger] Re: Epoxy Cure
- Hi, I work with chemicals, my experience is to discard all unsealed chemicals or expect bad results and onced opened soon thereafter, oxigen & humidity are main cause of spoilage. I have no personal experience with epoxy But, everything I've read on the subject says humidity causes this problem. Thanks, Mike
--- On Sat, 4/18/09, gbship <gbship@...> wrote:
> From: gbship <gbship@...>
> Subject: [bolger] Re: Epoxy Cure
> To: firstname.lastname@example.org
> Date: Saturday, April 18, 2009, 3:42 AM
> Sometimes epoxy is must mysterious.
> There's a local commercial fishing boat supplier that sells
> an inexpensive 4:1 and 5:1 epoxy. I've had the same problem,
> mostly with the 4:1 stuff, mixed carefully and thickened
> with wood flour. The stuff set rubbery, although it did,
> after a few weeks, eventually harden. Unthickened, it will
> usually set tack free in a day or so, but may take several
> days to harden enough to sand. But sometimes it's quicker
> setting than others. Like you, humidity is my guess as the
> variable (since I live in Florida), but it's just a guess.
> --- In email@example.com,
> "titanicslim" <titanicslim@...> wrote:
> > --- In firstname.lastname@example.org,
> "Scott Webber" <scottw@> wrote:
> > >
> > > I've been working w/ the same 2:1 epoxy
> laminating resin for years.
> > > Always w/ success. A strange thing happened the
> other day. I made a
> > > small quantity from a gallon kit that I'd used
> most of recently.
> > Hi, Scott
> > The thing that I focus on, because of past epoxy
> difficulties I have experienced, is the epoxy itself.
> I stopped using System 3 because of it.
> > After a situation that sounds a lot like yours I was
> told by a chemist that the component parts of epoxy, if left
> to sit a long time, may separate in the bottle so that the
> mixture of the two parts will not give you the required
> mixture. In other words, I wonder if one of
> your "A" or "B" bottles might have stratified and left you
> with an incomplete or imbalanced composition and given you a
> less-than-optimal final mixture.
> > The contaminated Cab-o-sil may or may not be
> complicating the issue but, if you suspect it, leave it out
> of your tests or get a fresh batch.
> > Dave
> Bolger rules!!!
> - NO "GO AWAY SPAMMER!" posts!!! Please!
> - no cursing, flaming, trolling, spamming, respamming, or
> flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks,
> Fred' posts
> - Pls add your comments at the TOP, SIGN your posts, and
> snip away
> - Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester,
> MA, 01930, Fax: (978) 282-1349
> - Unsubscribe: email@example.com
> - Open discussion: firstname.lastname@example.org
> Yahoo! Groups Links