Leon wrote:
"krw" wrote in message
...
On Mon, 7 Sep 2009 10:50:00 -0400, "dadiOH"

Along those lines... What, besides the markeering on the bottle, is
the difference between TB2 and TB3. Price, I know.


There was a test done about 5 years ago compairing the wood glues. TB3
"claims" water proof over weather resistant for TB2. The magazine test
showed TB2 to actually be more water resistant than TB3.
If you read the fine print on the back of the bottle of TB3 you find that
there is a reference to the testing lab qualifications for "water proof".
Other than "Water Proof" being mentioned in the title of the test
standard, from that point forward water resistant is the only compairison.
The TB3 lable is as misleading as hell.
....

I disagree; the label says what ANSI test the product(s) pass -- there
is quite a lot of difference between the two test procedures and it is
TB states the glue isn't to be used for locations that are immersed but
is suitable for continuous moisture exposure.

Basically the difference is a water-resistant glue passes muster against
the ANSI Type 2 Standard. TB didn't write the Standard; they simply
developed products (as did all the other manufacturers) that meet the
published specifications.

The Type 2 test is repeated cycle of a four-hour soaking of the cured
glue joint followed by a dry bake. IIRC, the repeat count is also four.
After this, the joint is tested for integrity.

The Type-1 ANSI Standard test for "waterproof" designation is similar
except the test joint is boiled for four hours (instead of simply being
soaked), then baked. The boil sequence is repeated then the sample is
cooled w/ running water and tested for integrity while still wet.

What some other testing regimen may have done could be interesting if it
represented some particular application one had in mind, but doesn't
have much bearing on the specific qualification of any product to meet
the ANSI Standard.

The ANSI Standard is simply what it is--a test regimen that indicates
the ability of the product to withstand the test cycle as specified. It
is simply a consistent measurement against which different products can
be compared. It's really nothing different than a specific UL rating
for other products; it has some meaning in that the product met the test
requirements but one can't draw conclusions other than those directly
observable from the results of the tests.

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