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My recommendation…don’t do it yourself. I bought and installed a somewhat expensive epoxy coating that was supposedly “breathable”. I should have known better / went with it anyway. After chipping loose mortar, grinding, acid washing and repairing areas, I applied the coating. While it looked great, at least for a while (months), it ended up bubbling up due to not having a vapor barrier. If the concrete was a lot thicker, maybe it would have worked out. I ended up scraping up what I could, then grinding off the other 75% , leveling and installing tile. In the end, I should have paid someone to tile it or install a professional coating (with warrantee), or resurface / color and polish… for just a few more bucks and a alot less hassle than to do it myself.
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