i know engineered flooring uses adhesives and this worries me. i think hardwood installation over conrete would be complicated (we live in a condo) and we were advised to choose engineered wood. thank you!
You can use the type of laminate that snaps together. This is installed over a pad that is rolled over the concrete. There would be no adhesive required. If you do go with the type of engineered wood that is glued together, the glue used is basically the same as yellow carpenters glue. The formula is slightly different, but for the most part it is very similar. The glue dries quickly, and once it's dry it should be sealed enough to not cause allergy issues. Hope this helps.