Sealing Crack In Shower Tile - Tiling, ceramics, marble - DIY Chatroom Home Improvement Forum
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Old 07-03-2020, 01:09 PM   #1
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Sealing crack in shower tile


In our shower stall some of the tile is cracked, not very wide but bigger than hairline (see attached photo). Weíre not concerned at this point with looks, we just want to make sure that water isnít getting through the crack. It looks like someone in the past may have tried stuffing some grout in there, but the grout itself looks cracked.

Here's what I was thinking of doing to seal the crack: I wonít try to remove the old grout -- itís too thin an area and I donít want to damage the tile any more than it already is. Iíll start by spraying bleach and using a stiff nylon brush to kill any mold, then clean it out and let it dry, then apply a thin bead of silicone caulk, let that dry, then razor blade over the crack to remove any excess from the tile surface. Thoughts? Thanks.
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Old 07-03-2020, 04:48 PM   #2
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Re: Sealing crack in shower tile


Without cleaning the grout out, you don't stand much of a chance of getting a good seal. If you were to remove the grout, you can use a color matched grout caulk cutting the tip very finely and pressing the caulk into the space, wiping with a wet sponge afterwards.

Is this in a wet area?
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Old 07-03-2020, 05:27 PM   #3
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Re: Sealing crack in shower tile


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Originally Posted by chandler48 View Post
Without cleaning the grout out, you don't stand much of a chance of getting a good seal. If you were to remove the grout, you can use a color matched grout caulk cutting the tip very finely and pressing the caulk into the space, wiping with a wet sponge afterwards.

Is this in a wet area?
Yes, it's a few inches above the floor of the shower, directly across from the wall with the shower head on it, so the water hits it directly. I do have an oscillating multi-tool and I can get a grout blade for it. Do you think that would work well?
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Old 07-04-2020, 07:27 AM   #4
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Re: Sealing crack in shower tile


As irregular as the crack appears, you would need to be very careful with the oscillating tool. A grout removal tool with a small carbide tip may be better. I would say in looking at the condition of the tile, that you may be needing a renovation before long. https://www.homedepot.com/p/QEP-Grou...020Q/100194652
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Old 07-04-2020, 07:51 AM   #5
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Re: Sealing crack in shower tile


I think you're missing the point here. Tile doesn't just crack. Something is making it crack. It's not floor tile, so there's no force applied to it. Normally shower wall tile cracks because the wood behind it is getting wet and has expanded. If so, that means the wood got wet before that tile cracked, and that means there is a leak somewhere else, and that means sealing this crack won't do you any good.


In any case, if there is a crack and water is getting in, then it's never going to dry out without taking out the tile.
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