Kérastase Première Sérum Filler Fundamental is a light leaven-in treatment for internal repair of all types of damaged hair, leaving them shiny and elastic.

Due to their greater porosity, sensitized hair absorbs a higher amount of calcium from the water than untreated hair, causing a harmful excess of calcium visible inside and outside the hair fiber.

Kérastase Sérum Filler Fundamental has a double action:
- its light texture seals the cuticles to protect the surface of the hair
- fills the fiber and strengthens its strength.The hair is protected from hard water calcium damage, moisture and heat up to 230°C.
- The crisp effect is eliminated and the hair remains smooth and elastic, easy to manage.

For extra treatment of your bleached or damaged hair, use the entire Première range.Try the powerful efficacy of the stratification technique: Start with the Kérastase Concentré pre-shampoo treatment Decalcifier Ultra-Reparateur, then, without rinse the Concentré, use the Kérastase Bain Decalcifier Reparateur shampoo.Continue with the balm or mask before applying Kérastase Sérum Filler Fundamental as the final repair phase.

How to use: Apply to the buffered hair.Let it go.Dry with the hairdryer and heat up.