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Unread 02-24-2004, 05:39 PM   #1
jps99
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Join Date: Feb 2004
Location: Carlsbad, CA
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Did Customs' non-sanded, siliconized grout stain your granite tiles?

I just set the grout joint around my 'tile in' sink. This install has my sink surface flush with the granite tile surface surrounding it. It all looks good, as I masked the edges and used a soft rubber sanding pad to 'screed' the silicone grout into the joint.
Just one thing; the silicone grout has left a 'moisture signature' along the edges of the tiles its made contact with. The signature is only about 1/2 to 3/4" wide and looks exactly the same shade as when the bedding mortar was set. Of course the bedding mortar is H2O based, and dries after a few days. On the other hand, I know this siliconized grout contains some petroleum products and how much of it is in there I don't know. What worries me is that it's been 3 days now, and the moisture signature is still there.
Anyone had this type of experience with Customs' ( or any other) siliconized grout when making these type of joint seals along granite or other porous stone surfaces?
Any suggestions on helping it 'dry-out', etc.?
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Unread 02-24-2004, 08:40 PM   #2
John Bridge
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Hi JP, Welcome. Please cough up a name.

I think you're okay with the silicone. It'll probably clear out as it cures. Let's see what others have to say.
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Unread 02-24-2004, 09:08 PM   #3
jps99
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So John Bridge, it sounds like you've heard of this phenomena before. If so, would it have been a good idea to seal the granite tiles before grouting the joints, then again afterwards?
Thanks for your time.
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Unread 02-25-2004, 09:53 AM   #4
John Bridge
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Hi Pat,

Silicone is often used over natural stone, so I don't see that as a problem.

I never pre-seal anything before grouting, and I've never had a serious problem. I think you are seeing the moisture imprint from the water in the grout. It will evaporate. If it were grout, it would be all over the surface, but even if it is grout, it can be removed with a cleaner. Let's give it a couple days.
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