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Posted by William Noble on May 12, 2008, 2:24 am
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> Silicon sealants exude acetic acid, causing rust and that's why a butyl
> compound is used for auto glass installations.
yes, and the urethane is MUCH MUCH stronger - if there is interest, I can
explain, suffice it to say for now that I've used both on a large piece of
glass and if done right the Urethane is amazing
>
** Posted from http://www.teranews.com **
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Posted by Michael Koblic on May 12, 2008, 6:56 pm
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Is this a relative of such adhesives as Sumo or Gorilla glue?
I have been disappointed with both. They are no match for epoxy (West
system, JB Weld).
They work fine for wood, provided you can sand afterwards as they swell up
and exude from the joint for quite a while.
But I would certainly be interested in details.
--
Michael Koblic,
Campbell River, BC
>
>> Silicon sealants exude acetic acid, causing rust and that's why a butyl
>> compound is used for auto glass installations.
>
>
> yes, and the urethane is MUCH MUCH stronger - if there is interest, I can
> explain, suffice it to say for now that I've used both on a large piece of
> glass and if done right the Urethane is amazing
>>
>
>
> ** Posted from http://www.teranews.com **
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Posted by Ed Huntress on May 12, 2008, 7:13 pm
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> Is this a relative of such adhesives as Sumo or Gorilla glue?
> I have been disappointed with both. They are no match for epoxy (West
> system, JB Weld).
> They work fine for wood, provided you can sand afterwards as they swell up
> and exude from the joint for quite a while.
>
> But I would certainly be interested in details.
>
> --
> Michael Koblic,
> Campbell River, BC
Two-part polyurethanes, which is what I think these guys are talking about,
are not much like moisture-cure polyurethanes, which is what Gorilla Glue
is.
Gorilla Glue has its uses, but the two-part stuff is more like a tenacious,
more-flexible epoxy. Its adhesion is tremendous, even on metals. It's an
industrial product. There may be consumer product versions of it, but I've
never seen any.
--
Ed Huntress
>
>
>>
>>> Silicon sealants exude acetic acid, causing rust and that's why a butyl
>>> compound is used for auto glass installations.
>>
>>
>> yes, and the urethane is MUCH MUCH stronger - if there is interest, I can
>> explain, suffice it to say for now that I've used both on a large piece
>> of glass and if done right the Urethane is amazing
>>>
>>
>>
>> ** Posted from http://www.teranews.com **
>
>
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Posted by Randal O'Brian on May 12, 2008, 1:00 pm
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> Silicon sealants exude acetic acid, causing rust and that's why a butyl
> compound is used for auto glass installations.
>
>
> --
> Stupendous Man,
> Defender of Freedom, Advocate of Liberty
There are a large number of silicone adhesive formulations that do not exude
acetic acid. They are known as neutral cure or oxime cure. Check the
Dow-Corning site for examples.
Randal
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Posted by Doug White on May 14, 2008, 9:33 pm
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>
>> Silicon sealants exude acetic acid, causing rust and that's why a butyl
>> compound is used for auto glass installations.
>>
>>
>> --
>> Stupendous Man,
>> Defender of Freedom, Advocate of Liberty
>
>There are a large number of silicone adhesive formulations that do not exude
>acetic acid. They are known as neutral cure or oxime cure. Check the
>Dow-Corning site for examples.
I've used neutral cure silicone adhesives for decades on satellite
hardware. Some is air cure, some is 2 part.
Doug White
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> compound is used for auto glass installations.