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Unread 06-07-2014, 03:42 PM   #1
linelle
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Cleaning tiles before sealing grout

My tub/shower surround was just tiled (Daltile ceramic subways, Laticrete unsanded grout, narrow grout lines). My tile-setter told me I could seal the grout after 72 hours. He told me to first clean with acetone, as water would get everything wet again. I've read not to get acetone on grout. If that is so, then what should I clean the grout with? Or will the grout be ready to seal without any additional prep?

I have some 511 Impregnator that I bought two years ago for sealing my backsplash grout. Will it still be good?

Thanks in advance.
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Unread 06-07-2014, 03:49 PM   #2
Richard Tunison
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If you are needing to clean from a new install I'd invite your tile setter back to clean things up to be ready for sealer.

NO acetone for cleaning!!!!!!!!

Got a pic. of what needs cleaned?

Get new sealer as I wouldn't trust a product that old.
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Unread 06-07-2014, 04:02 PM   #3
linelle
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Hi Richard, thanks for your reply. The tile setter cleaned up very nicely, best I can tell. I simply asked him what grout sealer I should use and he recommended the 511. I'll buy a new bottle. He suggested going over with acetone, not water. It all looks nice and clean to me.
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Unread 06-07-2014, 04:23 PM   #4
Richard Tunison
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Looks like a great install!! Very nice. It appears to be a mud job?


He might think that a little bit of grout dust is in the joints and good on him......... but I'd still use a very well wrung out sponge to clean the joints........... let it dry a day or two and then seal.

Let's see what others have to say.
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Unread 06-07-2014, 04:36 PM   #5
linelle
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Hi Richard. Thanks! I'm not sure what you mean by a mud job. I know there was dark gray stuff (thin set? mud?) between the Kerdi board and tile. It looked very clean between the tiles before he grouted, i.e., no oozing up between the tiles.

My guy really went over the tile with a sponge after he was done. I think as you do that he was mostly talking about residual dust.

I'm not in a huge hurry. The floor tile goes in Monday or Tuesday, with the inevitable dust from that. I'll be sealing that grout as well. I'd just as soon wait till the dust settles a bit before proceeding.
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Unread 06-07-2014, 04:53 PM   #6
Richard Tunison
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Cool,,,,,,,,,, a Kerdi board shower. You are on the right track. Let the dust settle and then proceed with the sealing.
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Unread 06-07-2014, 04:58 PM   #7
linelle
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Cool. I'm glad to hear my tile has a good foundation. I think Miguel did a fine job. He'll be the one setting my floor tile, and I'm confident he'll do that one well too.
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Unread 06-07-2014, 05:20 PM   #8
Richard Tunison
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Just for your own personal info.,,,,,,,,, here is what I meant by a mud job.

https://www.youtube.com/watch?v=8mkbgoykj6o

We love pictures,,,,,,,,, do you have any other pics. of the shower build?
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Unread 06-07-2014, 06:32 PM   #9
linelle
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Richard, I watched the video. No, they didn't do a mud job on mine. Other than to set a vertical level, what purpose do those strips serve?

I didn't take pics throughout the process so as not to be in the way. This photo shows the last bit of Kerdi board to be covered. They demo'ed everything down to the studs and then put on some sort of wall board, not like sheetrock but with what appeared to be a waterproof film. Then some type of mud between that and the Kerdi, then the tile. It was a much thicker base than my old tile.
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Unread 06-09-2014, 03:16 PM   #10
linelle
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How many coats of grout sealant?

I bought a new bottle of 511 Impregnator and sealed the (unsanded) grout in my shower/tub alcove. I'm pooped.

Do I need to do more than one coat?

When I applied the Impregnator, the grout darkened, so I know it was being absorbed. Do I reapply until the grout no longer darkens?
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Unread 06-10-2014, 12:43 AM   #11
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1 coat will usually do it if you got good coverage and allowed the sealer time to penetrate.
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Unread 06-10-2014, 06:37 AM   #12
doitright
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Hi Linelle

Do a water test today. If the grout darkens before 5 minutes you'll need another coat.

If you apply another coat, be sure to buff the excess sealer off the face of the tiles. Depending on the porosity of the grout 2-3 coats may be needed.
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Unread 06-10-2014, 06:58 AM   #13
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Hi Linelle

For future final cleaning projects, I highly recommend using a damp micro fiber towel, followed by buffing with a dry micro fiber. They work excellent for getting any residual dust off the surface. After cleaning, allow the grout to dry for a short period of time prior to sealing.
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Unread 06-10-2014, 07:16 AM   #14
linelle
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John, thanks for the advice. I use microfiber cloths for a lot of cleaning jobs so that makes perfect sense. I sealed the grout yesterday! Now I'm wondering if one coat is enough or if I need to do it again.
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Unread 06-11-2014, 07:40 AM   #15
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Hi Linelle

Do a water test and see if the grout darkens immediately. Just run a wet sponge over the surface and see what happens.

If the grout does darken (also known as wet out), time how long it takes to return back to its original color.
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