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Unread 06-18-2022, 08:35 PM   #1
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Tile over sealed concrete

I apologize for the question, but I couldn't find any info specific to my question with the search.

I am building out a new laundry room and I want to do a tile floor. Nothing fancy, just some 12x24 I have been using.

The issue is the concrete is sealed. It is crack free and 65+ years old, so I am not worried about movement. Just the sealer. I have no idea what sealer was used, but I will bet it was some kind of nasty non-EPA type from 1955.

I know that I could grind it but I spoke with the Laticrete people and they tell me their Prime-N-Bond would be perfect for the job.

Has anyone ever used it in this kind of application? I would have to think it would be fine as it is designed to go over glossy tile and provide the adhesion needed.

Thanks everyone!
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Unread 06-18-2022, 08:58 PM   #2
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Hi Mike,

What size room is this? And is the surface sheen of the concrete dull or shiny?

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Unread 06-18-2022, 09:00 PM   #3
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I would say it is slightly shiny. Not bright like new sealed, but not dull like untreated concrete.

I did the seal test with water, zero absorption in 24 hours.

The room is 6' wide and 13'2" long.
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Unread 06-18-2022, 09:20 PM   #4
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Looks like Prime and Bond would work for your application.

I've never used it before, but if I was a little gun-shy and wanted to assure myself that it would work, I'd cover enough area to do some scrap tile, let it dry, then bond a tile and check the adhesion after a few days.

It may seem like a bit of overkill, but if I saved myself all the grinding, and made sure I had a good bond, it would be worth it.

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Unread 06-19-2022, 12:42 AM   #5
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Thanks for the ideas guys. I will try it out and see how it goes. I am just doing drywall right now, so it will be at least a week before I get to tiling and I will report back.
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