best eyelash mascara primerNext is Sugar Lash Pro’s lash extension primer. Though they are not huge advocates of primer, in general, their primer does work great! They are a Canadian-based company, but they do ship to the U.S.!  Free shipping with $49 purchase or Fast & Free Store Pickup. Exclusions Urban Decay Subversion Eyelash Primer, Prepares Your Eyelashes for Mascara and Improves its Effects, 8.5ml Mascara is an easy, effective way to draw attention to your eyes. But if your mascara just doesn’t make your lashes look as long or as thick as you’d like, it may be time to add a new product to your makeup routine. With an eyelash primer, you can get full, fluttery lashes every time, no matter what mascara you use. Are you tired of your mascara flaking off by the end of the day? Try this smudge-proof, water-resistant lash primer, which has miniature flake-free fibers and peptides to help condition your lashes and extend your mascara wear time.