Keractive® Pure Vials – Intensive Biomimetic Keratin Filler and Cuticle Bio-cauterization 0.5 oz.ea Aligns the cuticle provided softness. Renew the hair fiber. Its areas of Bio-cauterization restructure and seal the surface of the hair. Protects against breakage. Seals the hair cuticle to maintain the inside repairing effect progressively. Biomimetic Keratin renews hair from the cortex by replacing the lost Keratin. • Bio-cauterization spheres of Keratin restructure and seal the hair surface. The micro spheres of Keratin are activated inside the hair by applying heat to the hair fiber. Greater resistance against breaking. This sale includes 2 vials. I put this on before I dry and flat iron my hair.