There's a new technique in town called underlashing and now Duo has developed a versatile glue for it that lets you use the hack with any of your favorite fringes. Duo Bond & Seal locks any kind of lash in place for days while providing comfortable, non-irritating wear. The dual-ended tube features Black Bond on one side and Clear Seal on the other. Black Bond adds definition and strong hold. Clear Seal takes away tackiness and protects longevity of lashes. Adhering false lashes underneath real lashes conceals the band for the most seamless look possible.