Note:

• What is Kérastase Premiere Filler Fondamental Repairing Anti-Frizz Serum?

  The Kérastase Première Anti-Frizz Serum is a luxury leave-in fluid designed to remove rigid calcium buildup, repair internal keratin links, and seal out external moisture. It serves as a comprehensive heat protectant bond repair treatment for heavily processed or damaged hair structures.

• How should I apply the Première Filler Fondamental serum for best results?

  Apply one to two pumps of this anti-frizz leave-in fluid to clean, towel-dried hair after washing. Smooth the cream evenly through your mid-lengths and ends, making sure to avoid your roots. Comb through with a wide-tooth tool to distribute the product uniformly, and style as usual without rinsing.

• Does this humidity shielding hair serum provide protection against hot styling tools?

  Yes, the formula provides a powerful thermal shield that guards weak, over-processed lengths against styling tool temperatures up to 230°C. Using it before your blow-dryer or flat iron locks in deep internal moisture and directly prevents brittle strands from snapping.

• Will this rich leave-in cream weigh down fine hair or leave it greasy?

  No, despite its intensive bond-repairing qualities, the fluid has an ultra-absorbent, white cream texture that melts directly into porous hair fibers. It leaves no heavy synthetic coating or sticky buildup behind, ensuring fine hair types retain their natural body and airy movement.

• How does this serum protect the hair against midday humidity and frizz?

  This advanced formula fills in the open, damaged gaps along the hair cuticle layer, wrapping each strand in an invisible smoothing shield. By blocking damp external air from invading the hair shaft, it effectively stops midday swelling, static flyaways, and puffy textures.

• Is the Kérastase Première Anti-Frizz Serum safe for bleached blonde hair?

  Absolutely. Bleached and highlighted strands are naturally porous and absorb excess calcium from tap water, leaving them stiff and snapping. This serum decalcifies the fiber and seals the hair cuticle, restoring incredible flexibility and soft shine without shifting your colour.

• What are the main active ingredients driving the structural repair?

  The formula utilises a concentrated dose of Glycine, an essential amino acid that works from within to reconnect broken keratin links, alongside Peptide molecules that plump up and smooth over the rough surface of the hair cuticle, restoring long-lasting strength and smoothness.

• What is the exact size of the Kérastase Première Anti-Frizz Serum bottle?

  The standard full-sized retail bottle of this professional formula contains 90ml of product. The bottle features a precise pump mechanism that dispenses the perfect amount for each styling session, making a single bottle last for many months of regular use.

• Should I apply this leave-in fluid directly to my scalp or roots?

  We recommend keeping this treatment focused away from your roots. Your scalp produces its own conditioning oils naturally, so apply this formula from the ears down to focus exclusively on the older, drier parts of your lengths that actually face mechanical friction and styling damage.

• Does this product help visually seal split ends?

  Yes, the peptide fillers coat rough, frayed fibers on contact, making them look instantly smooth, healthy, and completely aligned. It significantly reduces physical brushing resistance, which directly helps prevent new split ends from traveling up the hair shaft.

• Can I use this serum on naturally curly or wavy hair structures?

  Yes, it works beautifully across all damaged hair textures that struggle with frizz and moisture loss. It provides excellent suppleness and elastic strength to curly structures, keeping your pattern defined, soft, and bouncy during diffracted blow-drying.

• What scent does this Kérastase Première serum leave on the hair?

  It leaves a signature premium fragrance profile filled with refreshing top notes of mandarin orange, a delicate heart of summer orange blossoms, and a comforting woody base, wrapping your strands in a long-lasting fragrance that smells remarkably expensive.