DUO Brush-on Strip Lash Adhesive is now available in Dark Tone! Renowned for offering a safe, firm hold, DUO adhesive is among the best in the business. Perfect for people with darker lashes, this DUO glue features a latex free, hypoallergenic formula that provides a long lasting, strong hold of your false eyelashes. The easy to use brush on wand, means that applications are fuss free, and there is minimal mess every time. Ardell is a cruelty-free brand; they do not test any of their products on animals. All products are vegan.