Thinset as grout?

abchoppersJune 21, 2009

Hi all, I'm in New York. I just finished an outdoor patio project which was installing multi color 12x12 slate over a concrete slab. I have 3/8" grout lines. It's 350sq ft.

Can I just use grey thinset to grout with? The color matches fine and it's quite a bit cheaper than grout, plus I thought it might last longer outside.

I used Flexbond to install the tile, but if I can use thinset for grout can I just use the cheaper unmodified thinset?

Thanks all for any replies,

Ryan

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bill_vincent

First off, I wouldn't use thinset for a couple of reasons. Not only will it shrink and crack in the joints, but it would be a huge PITA to get clean. Additionally it'll "drag" as you run the sponge across the joints

Secondly, I don't know what you were planning on using for grout, but I've yet to EVER see a grout, other than epoxies, that are more expensive than thinset.

Use the proper mortar for each use. You'll be much happier in the longrun.

    Bookmark   June 21, 2009 at 7:54PM
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abchoppers

Thanks for the quick reply. I'll definitely stick with grout then, is just regular sanded grout okay for outside? I'll be sealing it and the slate after I'm all done. Thanks again

    Bookmark   June 21, 2009 at 8:20PM
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