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Old 08-11-2018, 08:52 PM   #1
ebennett2
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silicone caulk won't stay on cultured marble

We moved in to a house 3 yrs ago with a cultured marble shower-the kind with big slabs. Soon after, we had mold on the caulk. I tried bleaching it over and over--didn't work.

So we hired someone to run a fan to the outside of the house, letting the steam out.

We've replaced the caulk twice with the proper silicone product for baths. It gets gummy and soft, and then moves away from where it should live.

We're going to try Lexel caulk next--heard that silicone caulk won't adhere well to acrylic, etc. and that this product should work better.

If this doesn't work, I'm afraid we're going to have to rip up the cultured marble since we must have leaks.

Any other ideas are welcome. Thx
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Old 08-12-2018, 06:53 AM   #2
Tool Guy - Kg
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Welcome to the forum, ebennett22.

You deserve your own thread, so I’ve split this off onto its own.

A few questions:
1) While 100% silicone will adhere very well to those panels, it doesn’t stick well to cured silicone. What did you use to completely remove the silicone remnants from the cultured marble after what I’m guessing is you cutting out the caulk bead with a razor?

2) Exactly what silicone product did you use?

3) What is the date of manufacture (or expiration) of this silicone?

4) Did you use the same silicone tubes for both repair attempts?

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Old 08-12-2018, 08:26 AM   #3
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Once the silicone is removed, I'd let that joint dry out for as long as possible. You may already have water behind the slab that won't dry out, but if it's just a little bit, it might dry out with a fan turned on it for a day or two.

Good luck.
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Old 08-15-2018, 10:09 PM   #4
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You still there, ebennett22?



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