Paris Premiere Anti-Frizz Reparative Filler Serum - 3.04 oz

Experience the ultimate finishing touch for damaged hair with the Kérastase Première Sérum Filler Fondamental, a lightweight yet potent leave-in serum specifically engineered to combat frizz, seal damage, and provide essential heat protection. Hair that is heavily damaged by hard water and chemical processing is highly porous, making it vulnerable to frizz and humidity; this 3.04 oz serum creates an effective hydrophobic barrier that actively repels moisture while deeply filling and reinforcing the hair fiber's surface. This targeted action provides a 72-hour anti-frizz shield and leaves hair 3 times smoother immediately upon application, making it the non-negotiable step for a sleek, polished finish.

This innovative serum is powered by the signature Première dual-repairing complex, working to strengthen and smooth your hair from the inside out. While the prior steps of the regimen focus on decalcifying and internal repair, this leave-in serum utilizes Peptides to physically seal and fill the hair's rough, porous outer surface, and Glycine to reinforce its structure. The result is a dramatically healthier fiber, providing an impressive 99% stronger hair and 85% shinier hair with visible results after just one use. Furthermore, this multitasking formula acts as an essential styling safeguard, offering robust thermal protection up to 450°F (230°C) against the daily assault of styling tools.

This versatile serum can be applied to both damp, towel-dried hair before blow-drying or to dry hair as a final, frizz-taming touch, making the 3.04 oz bottle a long-lasting staple in your hair care arsenal. Its feather-light, balmy texture melts into the hair without any greasy residue, preserving volume and bounce while delivering intensive nourishment and a luxurious finish. Infused with the uplifting "Portofino Summer" fragrance, a radiant blend of citrus and floral notes, the Sérum Filler Fondamental is the daily secret to locking in repair, locking out humidity, and achieving a professional, lustrous smoothness that lasts.

72-Hour Anti-Frizz and Humidity Shield: The serum creates a powerful, lightweight hydrophobic barrier on the hair surface that actively repels external moisture and locks out frizz, providing 72-hour protection against humidity. This means your sleek styles remain smooth and disciplined, preventing the puffiness and flyaways that damaged hair is prone to absorb.

Instant Fille-in and Surface Sealing: Formulated with Peptides, the serum instantly acts as a "filler," sealing the cuticles and smoothing the porous, rough surface of damaged hair fibers. This immediate smoothing action results in hair that is 3 times smoother and visibly reduces the appearance of split ends, creating a polished, healthier look.

Exceptional Strengthening and Shine: Beyond surface perfection, the serum contains Glycine to penetrate and reinforce the hair's internal structure, achieving a measurable increase in resilience. This strengthening power provides up to 99% stronger hair and enhances the reflective quality of the fiber, resulting in 85% shinier hair after a single application.

High-Level Thermal Protection: Essential for all heat styling, this leave-in treatment shields hair from thermal damage up to a scorching 450°F (230°C), making it a critical last step before using a blow dryer, straightener, or curling iron. This protection ensures that your efforts to repair your hair are not undone by the stresses of daily styling.

Lightweight, Non-Greasy Balmy Texture: Despite its concentration of powerful repairing and sealing agents, the serum has a revolutionary lightweight, balmy texture that quickly absorbs into the hair without leaving behind any heavy, sticky, or greasy residue. This ensures deep nourishment and protection without ever sacrificing volume or natural hair movement.