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Lodewijk Stegman

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On Jul 11, 5:54 pm, Lodewijk Stegman
wrote:

As far as
'goo's' go, you will have a hard time finding one more waterproof
than epoxy.

And to suggest I said anything different would be innacurate at best.
Although there are many out there I have not used, so I won't guess

If I remember correctly you were discussing a use of epoxy and glassfiber
which, save the use of bamboo, was a perfectly normal method to
strengthen and weatherproof a wooden construction.
It was silly to state that epoxy is not waterproof in such a context.
It's waterproof enough.

Of course everything relative. Glass or steel will be more waterproof
than epoxy, but it is waterproof enough to use it in woodcore boats
or stitch-and-glue boats to make them last for a very long time.

Waterproof "enough". Now you are starting to understand. But maybe not
for the guy who wants to use it to seal a bamboo mast, where is where
this discussion started.

Your remark did not specifically relate to the fact that the epoxy was
used on bamboo. You simply said: iet's not waterfroof.
Thousands of boats have been built using epoxy to prove that epoxy is
watertight enough for use on dimensionally stable wood. If the wood had
the right moisture content at the start, the boats won't rot from within,
so why keep stressing that epoxy is not completely, absolutely
waterproof?
Fact is that as long as the epoxy or epoxy-and-glass skin is not
punctured, those boats have an almost infinite life-span. Water-
absorption through an intact epoxy-skin is not a factor.

[epoxy used only for gluing]

It might work with massive wood joints, if the cross-sections are
relatively small.

I works better when glueing plywood. The joints last
longest in boats that are designed to be build using epoxy
throughout.

Or allow for escape of aquired (not built on wet wood) moisture and
finish with something like paint.

Aquired moisture is a factor in the restoration of boats. New boats
should be built of wood with the right moisture content.

And if I am understanding your
assumptions, encapsulated boats should last forever, and they don't.

Encapsulating traditionally built (skin-on-frame) boats is a tricky
business.
Boats that were designed to be built using epoxy can be encapsulated in a
reliable way without any difficulty and can last very long. At least as
long as any polyester boat en with some care as long as any boat.

Comparing epoxy and polyester when talking about gluing is useless.
Polyester resin sucks as a glue for wood.

I never said anything like that. I said " I use epoxy as an anhesive
and sometimes as a laminating resin, I use paint to protect wood".

You at least created the impressing of making that comparison, because
your remark on polyester directly followed your remark on epoxy being
pretty pliable.

--
Lodewijk

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