Remove Ceramic Tile Glue From Concrete Floor. You can easily remove ceramic tile and thinset from your concrete floors. If you're wanting to level the floor or lay new flooring directly on to the concret. If that happens, place the tip of the chisel at 45º on the horizontal line between the mortar piece and the rustic floor.

Use a ball peen or masonry hammer and cold chisel to tap the pieces free. You can leave bits of adhesive up to 1/8 in. However, be careful not to scrape with a sharp instrument that can scratch or gouge the floor.
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It's not like epoxy or other glues used for tile, and it can be difficult to remove. If that happens, place the tip of the chisel at 45º on the horizontal line between the mortar piece and the rustic floor. The glue should easily come off the floor if allowed to sit on the adhesive long enough. Bedding could be damaged but can be fixed with morta or other product.