DUO Brush on Strip Lash Adhesive White/Clear - Latex & Formaldehyde Free! This DUO Brush On adhesive comes with an ultra-thin brush for precise, quick application of both strip and individual lashes for all-day wear. Formula contains Vitamin A, C & E and is safe for contact lens wearers and sensitive eyes. To use, simply apply a thin line of adhesive along the strip lash band. Wait 30 seconds to set and apply lashes as close to the eyelid as possible. Secure lash band by pressing onto lash line. This Duo brush on adhesive dries clear and invisible to keep your eye makeup perfect! For best result, apply full makeup first and lashes after. Then apply eyeliner last to blend in the lash band.