Review on Upgraded Luxillia Brown Magnetic Eyeliner For Magnetic Eyelashes With Strong Hold, Natural Look, Waterproof & Smudge Proof - Pack Of 2 by Kevin Baker

I know the manufacturer says to wait for the eyeliner to dry, but don't! If you use it right away, it will stick better. The grey color seems to have some adhesive as well as iron. (Note, this was not my experience with the brown liner. Nothing I did could make the brown liner hold magnetic lashes). This way the hold is windproof and if you use anchor lashes on the underneath, you'll have all day hold 99.9% of the time.