Product Details

How to use

Step 1 - Apply to freshly washed and towel-dried hair. Dispense the anti-breakage hair serum into your palms, then evenly distribute it throughout your hair, focusing on mid-lengths to ends. Use a wide-tooth comb or your fingers to detangle and ensure thorough coverage.
Step 2 - Leave the product in your hair without rinsing. This allows the formula to deeply penetrate each strand, providing nourishment and protection from within.

Key Ingredients

Peptide

A chain of amino acids that refills hair surface with matter.

Glycine

Once calcium is removed, this amino acid penetrates hair's inner layer to deeply repair.

Full Ingredient List

AQUA / WATER / EAU • ISOPROPYL MYRISTATE • DIMETHICONE • TRIETHANOLAMINE • AMODIMETHICONE • PARFUM / FRAGRANCE • PHENOXYETHANOL • CARBOMER • POLYQUATERNIUM-4 • POTATO STARCH MODIFIED • LIMONENE • HYDROXYPROPYL GUAR • BEHENTRIMONIUM CHLORIDE • HYDROLYZED VEGETABLE PROTEIN PG-PROPYL SILANETRIOL • GLYCINE • TRIDECETH-6 • ISOPROPYL ALCOHOL • LINALOOL • CETRIMONIUM CHLORIDE • CITRAL • COUMARIN • BENZYL SALICYLATE • SODIUM BENZOATE • BENZYL ALCOHOL • CITRONELLOL • ALPHA-ISOMETHYL IONONE • POTASSIUM SORBATE • GERANIOL •

FAQs

Please read our FAQs page to find out more.

What is Kérastase Sérum Filler Fondamental, and what does it do for the hair?

Kerastase's hair treatement serum for all hair types, especially those that are damaged and prone to frizz. This anti-frizz filler serum is formulated to combat humidity, deeply nourish the hair, and effectively block out frizz, providing lasting protection against heat styling tools.
By filling the hair fibre's surface with essential nutrients, it revitalises and recreates softer and smoother hair.

How often should I use Kérastase Hair Repair Sérum?

For optimal results, we recommend using Kérastase Sérum Filler Fondamental daily or as needed, depending on your hair's condition and styling routine. Apply a small amount evenly throughout damp or dry hair, focusing on the mid-lengths and ends. You can also use it before each blow-dry.

Does Sérum filler fondamental need to be rinsed?

No, Kérastase Sérum Filler Fondamental is a leave-in serum, meaning it does not need to be rinsed out after application.

Can Kérastase Sérum Filler Fondamental be used on chemically processed hair?

This Kérastase hair repair serum is safe for chemically processed hair. It helps restore moisture, improve hair texture, and protect against environmental aggressors, making it ideal for maintaining healthy-looking hair post-treatment.

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