Instant Effects Instant Lash is a lash volumiser that increases the thickness of your individual lashes by up to 20% in just 2 minutes. Individual lash / brow hairs are instantly plumped by an average of 20% in just 2 minutes Continued usage gives up to 40% increase in thickness in just 2 weeks Continued usage gives up to 20% increase in length in just 2 weeks Your mascara can be applied within minutes after application before mascara application.