Subject: Re: [baidarka] Glues
From: Gerald Maroske (email@example.com)
Date: Tue May 25 2004 - 15:39:13 EDT
I have no info concerning the allergic potential of epoxy hardeners, but
should not be messed up with polyester resin, where the hardener is much
toxic than the resin. In fact, epoxy resin is considered to be much more
than the epoxy hardeners, so be careful especially with spilled resin
Resorcinol glues I know of require tight and accurate joints and have
gap-glueing strength. Epoxies, well tuned, can fill larger gaps in
to resorcinol glues without significant strength loss of the glued
In addition, resorcinol needs clamping with high pressures. This is
from "Building classic small craft" by J. Gardner. His bottom line is,
recorcinol can do is done better by epoxy. He states, aside form the
gap-filling properties, curing temperatures can be lower with epoxies
dark colour with stain som woods badly if you plan to varnish.
My own experience is limited to only one brand of resocinol glue, but I
use it for laminated paddles.
The "Woodworking Handbook" recoomends resorcinol for laminating timbers
assembly joints which have to withstand severe service conditions. But,
according to Gardner, the US Plywood Corp. asks for a glue line not
than 0.005 inch, which is not that much.
Michael Daly wrote:
> On 18 May 2004 at 9:20, firstname.lastname@example.org wrote:
> > I'm surprised to hear doubts about the use of epoxy as a boatbuilding
> > glue
> I've never heard such - epoxy is the boatbuilder's glue of choice.
> > all epoxies are very toxic
> That's a bit of a stretch. Epoxies are certainly not nice and should
> be handled with care prior to curing. The hardeners in particular
> are hyperallergenic - they can easily lead to allergies. The best
> epoxies are tolerable to breath (though it's definitely not
> recommended). Keep it off your skin and make sure you've got lots of
> fresh air and/or a VOC filtered mask.
> Once cured, most epoxies are quite safe.
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