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  1. M

    Tiling over Black Jack

    Thanks Happy Plumber.
  2. M

    Tiling over Black Jack

    I have a concrete floor that has shown a little damp. I think the DPM was damaged when some central heating pipes were fitted. I can't afford to replace the floor. I have applied 2 coats of Black Jack to stop any damp coming through and now want to tile over the top, but not sure whether...
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