Kérastase Premiere Serum Filler Fondamental Serum 90ml

Kérastase Premiere Serum Filler Fondamental Serum 90ml is a celebrated salon-grade hair serum from the salon-exclusive haircare house Kérastase. Designed to deliver visible filler benefits to weakened, damaged hair, the rich serum delivers a transformative pre-shampoo or styling treatment — perfect for those targeting weakened, fragile or sensitised hair.

About Kérastase Premiere

Kérastase is the salon-exclusive haircare house founded in Paris in 1964 by L'Oréal. The Premiere range is the brand's targeted line for damaged, weakened hair — built around advanced repair and filler actives for visible transformation. Serum Filler Fondamental is the line's celebrated hero serum.

What it does

• Visible filler benefits — fills and reinforces the hair structure
• Targets damage and weakness — designed for fragile, sensitised hair
• Smooth glossy finish — leaves hair softer, shinier and more resilient
• Pre-shampoo or styling treatment — versatile use
• Salon-quality results — Kérastase professional expertise
• Generous 90ml size — substantial value for treatment routines

Who it's for

Premiere Serum Filler is ideal for those with damaged, weakened, fragile or sensitised hair who want a transformative treatment serum. Particularly well-suited to colour-treated, bleached or heat-stressed hair, and as the serum step in a complete Premiere routine.

How to use

1. Apply to dry or damp hair, focusing on damaged areas (mid-lengths and ends)
2. Massage gently into the hair shaft
3. Leave on for at least 5 minutes before shampooing (pre-treatment use), or leave in for styling
4. Shampoo and condition as usual after pre-treatment use
5. Use weekly for ongoing repair benefits

Specifications

• Size: 90ml
• Format: Hair treatment serum
• Hair type: Damaged, weakened, sensitised
• Use: Pre-shampoo or styling
• Brand: Kérastase
• Range: Premiere Serum Filler Fondamental