Is "damage-free" lash glue actually worth the upgrade, or is it just a marketing buzzword? I tested both side by side for eight weeks. I'll tell you exactly what I found — including the surprise that made me switch for good. Here's something you should know about me: I had a lash adhesive allergy reaction in my twenties that left my eyelids red and peeling for three days. The culprit? Cyanoacrylate, a common ingredient in regular lash glue. I've been on a mission for hours of comfortable wear without a single allergic reaction ever since.