Mastic For Shower Wall Tiles - Tiling, ceramics, marble - DIY Chatroom Home Improvement Forum

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Old 05-07-2012, 07:42 PM   #1
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Mastic for shower wall tiles

Ok so I am just about to start tiling (tomorrow hopefully) my newly constructed bathroom shower/tub. I have put up concrete board. I was told by a manager at Home Hardware to use mastic in the shower for the tile because it is much easier to use, etc. etc. I just had Mike Holmes on in the background and heard him say never to use Mastic in wet areas. So I jumped online quick to read up on it and saw a few blogs on here saying never to use Mastic. Two questions:

A) If it is Mastic that is meant for wet areas is that ok or should I use dry un modified thinset?

B) I have already used the Mastic over the joints in the concrete board. Can I now change to thinset or will it not adhere where the mastic is?

I'm annoyed because I already spent $50 on the Mastic but I want this done right.
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Old 05-07-2012, 07:47 PM   #2
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Take it back, never that a box stores advice. But while your there pick up the Red Guard you forgot to pick up to water proof the tile board.
Tile board is not water proof.


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Old 05-07-2012, 08:32 PM   #3
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Definitely easier to work with tile glue then using thinset although no one here will recommend using it anywhere except backsplash on kitchen.

I have use it in showers and none has failed although I don't anymore just because its over all not a good idea.

What size tile are you using? I say if your already using the tile glue then let hope your tile size isn't any bigger then 4-6"

Last edited by JetSwet; 05-07-2012 at 08:37 PM.
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bathroom , cement board , mastic , tile

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