KERASTASE Sérum Filler Fondamental 90ml

KÉRASTASE Sérum Filler Fondamental 90ml

Leave-In Strengthening Serum for Damaged or Treated Hair

Strengthen and protect your hair every day with KÉRASTASE Sérum Filler Fondamental 90ml, a lightweight, restorative leave-in serum designed for damaged, sensitized, or over-processed hair. Part of the Kérastase Première range, this powerful serum is enriched with Peptides, Amino Acids, and Hyaluronic Acid to deeply penetrate the fiber, reinforcing its structure and filling in surface damage.

Its ultra-fine texture instantly absorbs into the hair, leaving it stronger, smoother, and easier to manage—without heaviness. It also offers heat protection up to 230°C, making it an essential step before styling.

•  Reinforces and fills weakened hair structure


•  Hydrates and smooths without weighing hair down


•  Heat protection up to 230°C


•  Leaves hair silky, resilient, and manageable


•  Ideal for chemically treated or damaged hair

Perfect For:
Hair that is bleached, over-processed, or damaged
Daily protection and strengthening for weak strands
A lightweight, smoothing pre-styling serum

Pair It With:
???? Kérastase Bain Décalcifiant Réparateur – to gently remove calcium and cleanse damaged hair
???? Kérastase Fondant Fluidité Réparateur – lightweight conditioner to soften and detangle
???? Kérastase Concentré Décalcifiant Ultra-Réparateur – for deep fiber repair and reconstruction

Why You’ll Love It:
KÉRASTASE Sérum Filler Fondamental 90ml is your daily defense against damage, helping to rebuild and fortify hair while maintaining a natural, soft feel. With every use, your hair becomes visibly healthier, shinier, and easier to style.

Rebuild. Defend. Transform.
Reveal stronger, smoother hair with KÉRASTASE Sérum Filler Fondamental 90ml—a smart essential for modern hair repair.

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