Lightly scented Trichup Frizz Control Hair Serum is specially designed to give new life to soft, unruly curls, as well as easy combing and straightening. Sweet Almond Oil and Vitamin E help give hair a shiny, healthy look by creating a protective barrier against frizz. It provides the perfect amount of nourishment and softness for manageable, well-groomed locks. A hair serum is a liquid product usually made of silicone to create a protective layer on the hair cuticle to help smooth out frizzy hair.