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Silicone Caulk Greasy? stan 06-11-2008
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Posted by on June 12, 2008, 4:09 am
On Wed, 11 Jun 2008 08:25:57 -0400, "David L. Martel"

>Stan,
>
> The coin analogy may be instructive. You know that coins are dirty and
>greasy after they have circulated for a while so why do you think the grease
>is a function of the caulk?
> So, what are you actually caulking and why do you believe that it is
>clean? I suspect that you are seeing a residue of crud from your coin that
>has reacted with the acid of the caulk in some way.
>
>Dave M.
>

If he kept his caulk in his pants it would not get greasy !!!


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Posted by stan on June 12, 2008, 7:49 am

> Stan,
>
> The coin analogy may be instructive. You know that coins are dirty and
> greasy after they have circulated for a while so why do you think the
> grease is a function of the caulk?
> So, what are you actually caulking and why do you believe that it is
> clean? I suspect that you are seeing a residue of crud from your coin that
> has reacted with the acid of the caulk in some way.
>
> Dave M.



It's kind of a small curcuit board with solder balls. I think the ammonia
reacted with the solder during the cure process and that is what I thought
was grease becaus it made the rag darker when I rubbed it. Probably was
just solder that got softened up. This is the first time I've tried to use
silicone sealant with electronics so I learned something new. I read
accounts of amatuer radio hobbyists who have experienced the same issue.
Thanks.



Posted by Kuskokwim on June 11, 2008, 4:28 pm
On Wed, 11 Jun 2008 09:37:44 GMT, stan wrote:

> This is 100% silicone: http://www.caulkyourhome.com/sil2_kitchen_bath.html
>
> I rub a blue colored old T-shirt on the raised area's of the coin and it
> comes away darker like it was wet or greasy (even after 24hr cure). If I
> put a small bead of caulk on a piece of paper (without smearing it) and let
> it cure, it looks and feels rubbery like normal caulk with no greasy
> residue, even if I pull it away from the paper.
>
> Any thoughts on how this is occuring?

GE had some bad batches of clear silicone caulk that was oily and didn't
always dry properly, but it was Window & Door not the Kitchen & Bath that
your link leads to.

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