Revive and protect damaged hair with Kérastase Première Sérum Filler Fondamental—a lightweight, leave-in serum designed to repair internal damage, seal the cuticle, and shield hair from external aggressors. Ideal for bleached, brittle, or over-processed strands, this anti-frizz serum combats calcium buildup from hard water and provides heat protection up to 230°C. Enriched with peptides and glycine, it strengthens the fibre, smooths texture and delivers long-lasting shine and suppleness.

Key Benefits

• Repairs internal hair structure
• Seals cuticles and smooths the surface
• Protects against calcium damage from hard water
• Provides heat protection up to 230°C
• Controls frizz for up to 72 hours
• Enhances shine, softness, and manageability
• Ideal for all types of damaged hair
  *Instrumental test vs. unwashed hair

Key Ingredients

• Peptides – Amino acid chains that refill and reinforce the hair surface
• Glycine – Penetrates deeply to repair the inner fibre after calcium removal
• Hydrolysed Vegetable Protein PG-Propyl Silanetriol – Strengthens and protects
• Citric Acid – Helps neutralise mineral buildup
• Conditioning Agents – Dimethicone, Amodimethicone for smoothness and shine
• Fragrance – A luminous blend of citrus, mandarin, orange flower, jasmine, and woody notes