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Unread 04-12-2015, 11:11 AM   #1
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caulk stained marble

So I made a rookie mistake and used this colored "siliconized caulk" on my shower marble. I've used this stuff on marble before with no problems and assumed it would be ok but after a night the marble appears to have wicked up the pigment or oils or something and it really gives it a crummy appearance.

Any ideas? I would replace the tile but I used redgard for the moisture barrier which is between the backerboard and the thinset for the tile. So if I removed a tile I compromise the moisture barrier. Am I stuck with it?

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Unread 04-12-2015, 11:57 AM   #2
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Welcome, Ben.

Almost impossible that you'd remove those tiles without destroying your RedGard layer. But you won't know until you try.

In my experience that siliconized acrylic is less likely to migrate into your stone than would 100 percent silicone, but I haven't done a lot of that work. First thing I'd advise is that you wait a week or two before doing anything and see if that area might dry out.

My opinion; worth price charged.

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Unread 04-13-2015, 06:53 AM   #3
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Thanks CX

Yeah I was hoping it would fade. If it doesn't I'll just live with it. The way I look at it is if I damage the redgard layer then I basically have to remove ALL the cement board and start over. I'm not quite ready to do that. I know some people don't use a moisture barrier in the shower, but I think it's necessary.

I wonder what exactly the tile sucked up - is it an oil or something else? Who knows...
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Unread 04-17-2015, 10:20 AM   #4
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Have you considered applying a stone poultice?

You can try applying it to a small area that is out of the main line of sight as a test to see if it will work out.

Most of the time these are used as spot removers so it may turn out to be a chore to use over a large area.

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Unread 04-22-2015, 04:54 AM   #5
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Hi Ben

It looks like moisture wicking to me.

Is the marble polished? If so, it will take longer to dry out.

If you decide to poultice, please TEST first. The poultice may initially appear to make the area worse. I usually don't like to use a poultice until I know what type of stain I'm trying to remove. What caulk did you use?

Please report back.
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Unread 04-22-2015, 08:21 PM   #6
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Some marble will react like that to some glues and caulk. Their is not really much you can do about it. We always seal our marble countertops before we apply any type of adhesive or caulk.
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