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Ceramic tile over Stained concrete

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Guyfromtexas

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Joined
Sep 7, 2020
Messages
6
Location
Texas
I'm needing some advice to install porcelain 6x40 plank tile over a concrete floor that has been stained and urethane sealer on the surface. Tried a flooring buffer machine with 30 and 60 grit sandpaper but that just clogs the sandpaper up and doesn't do anything to get to concrete. I'm going to try a diamond disk grinder machine next but in the meantime, is there a stained floor type primer I can put down on it or some any other method of stripping the stain/sealer down to bare concrete?
 

highup

Professional
Pro
Joined
Mar 6, 2011
Messages
10,749
Location
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If it clogs up, that means it's removing material. Maybe it needs water to keep the loosened material in suspension. That might require a diamond disk on the buffer....... And a friend with a squeegee and wet vac to keep the liquid under control.
This isn't my profession, so I'm just adding a thought.
 

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