Permalash Lash and Brow Tint Used by beauty professionals for more than 40 years, Permalash is a market-leading eyelash dye and eyebrow tint used by salons across the world. Long-lasting, hypoallergenic, water-resistant and available in a range of shades, Permalash eyelash tint and eyebrow dye is designed to darken, thicken and add impact to brows and lashes. Delivering amazing results every time, Permalash has cemented its place as one of the original and best eyelash and eyebrow tints on the market. With up to six weeks of wear from a single application, you can create defined brows and showstopping lashes for your clients in a matter of minutes.