A leave-in repair serum for hair damaged by colour and heat
Kérastase Première Sérum Filler Réparateur Fondamental is a leave-in serum from Kérastase's Première range, made for damaged hair. It fills in rough, weakened areas of the fibre so lengths feel smoother, look shinier and are easier to comb.
The texture
A light, creamy serum that melts into damp hair without stickiness. It is a leave-in step, so it stays on and works on fibre roughness through the day.
Who it suits
- Hair damaged by colour, lightening or heat
- Lengths that feel rough or look dull
- Anyone who wants a repair step that stays in
- Users of the Première shampoo and mask
Worth knowing before you buy: It smooths and protects but is not a replacement for a mask if hair is severely damaged. Use less on fine hair.
Complete the routine

Première Masque Filler
A rinse-off mask from the same range.
Shop →
Première Bain Décalcifiant
A repairing shampoo that removes build-up.
Shop →Characteristics
- Format: Leave-in serum, 90ml
- Hair type: Damaged hair
- Concerns: Roughness, dullness, damage
- When to use: On damp hair after washing
- Main benefits: Smoothness, shine, easier combing
How to use
Apply a few pumps to towel-dried lengths, comb through, then style. Do not rinse.
Manufacturer information
Brand: Kérastase (L'Oréal Professionnel Produits)
Address: 14 rue Royale, 75008 Paris, France
EAN: 3474637196677
