Marble mosaic backsplash - removing paint on drywall?

[mdb06]

Thanks for the posting tip, CX. My mistake...figured a different topic warranted a new thread.

As for choice of thinset, seems like my two options approved for use on stone were cutom's prolite or the large tile and natural stone thinset. Versabond was only marked good for porcelain and tile. And while my mosaic sheets aren't large format, it is a natural stone, and was marked as non-sag so I figured this would be good for the wall application.

I agree, CX. There seems to be a ton of coverage of this adhesive on the mosaic backing, beyond the mesh grid. Not sure if it's quality control at the factory, but I'm concerned that actual exposed tile backing may be starting at 75%, maybe even 50% on some sheets.

[cx]

The only restriction to the use of VersaBond on natural stone is the usual restriction against use with moisture sensitive stone or resin-backed stone. But it does not carry the T designation for non-sag properties, and if that's what you're looking for, disregard my recommendation. If you haven't already.

Whatever you elect to use, I'd still recommend you make up a test board to see if it bonds well to the back of those tiles.

My opinion; worth price charged.

[mdb06]

Update after installation:
I used Custom's Large tile and Natural stone thinset in the end. Test board of marble mosaic sheets to drywall felt solid. Used a 1/4 x 1/4" square notched trowel for final wall installation. Some areas had a little thinset squeeze out but in majority of area, this felt like proper amount of thinset to apply. After 24 hours of dry time, went back to try to lift hexagon pieces that were tilted/uneven due to manufacturing error when gluing mosaics to sheets. They were not possible to remove, without doing major damage to surrounding marble. Moving on to sealing and grouting now.

I did try to contact the manufacturer, MSI, multiple times. Definitely felt like a call center each time. They told me modified thinset was recommended, but never had any response to the amount of adhesive used on the tile backing and if it was be an issue. One customer service rep informed me they are just the distributor, not manufacturer, and could not advise.