Kerastase Sérum Filler Fondamental 90ml

A leave-in hair repair serum that prevents hair breakage. This anti-frizz serum seals and plumps the hair surface and protects against the heat of styling tools, leaving hair shiny and strong.

Kérastase Première Sérum Filler Fondamental is a lightweight leave-in repair serum for all types of damaged hair . It leaves hair shiny and supple.

Because treated hair is more porous, it absorbs 3 times more limescale from the water than untreated hair, leading to harmful limescale buildup that appears inside and outside the hair fiber. Kérastase Sérum Filler Fondamental has a dual effect: its light and creamy texture seals the cuticle and protects the hair surface while filling the hair fiber and strengthening it. Your hair is protected from damage caused by hard water, limescale, humidity and heat up to 230°C. Frizz is reduced and hair remains smooth, bouncy and easy to style.

For even better care of your bleached or damaged hair, combine with other Première products. Try the layering technique for maximum effect: Start with Kérastase Concentré Décalcifiant Ultra-Réparateur before shampooing, then continue without rinsing with Bain Décalcifiant Réparateur. Finally, apply a conditioner or hair mask before applying Sérum Filler Fondamental as a final restorative step.


Prevents frizz for 72 hours*
3x stronger hair*
49% softer hair*
99% stronger hair*