The basics This bestselling, waterproof lash adhesive from Duo ensures false lashes stay put!  The benefits Made with vitamin A, C & E. The uses This top adhesive comes with an ultra-thin brush for precise application. And it blends perfectly with black and/or brown lashes. The bottom line DUO® Striplash Adhesive is the world's best selling lash adhesive and has been a favorite of professional makeup artists for decades.