KÉRASTASE Chronologiste Heat Protectant Hair Serum 5.1 oz — Argan + Marula Oils, 450°F Protection for Dry, Fine & Brittle Hair

This lightweight leave‑in cream from the Chronologiste line blends argan, marula and camellia oils to add slip, shine and hydration while creating a protective barrier before hot tools. It’s formulated to help reduce breakage during styling, lock out humidity for longer‑lasting smoothness and restore manageability to dry, fine or sensitized hair. Use after cleansing with Chronologiste shampoo and mask for best results.

How exactly does this serum protect hair from heat damage?

The serum forms a protective layer on the hair surface that buffers direct contact with high temperatures and helps minimize structural stress during blow‑drying or flat‑ironing. Ingredients like lightweight oils condition and smooth cuticles so heat is distributed more evenly across the strand.

• Heat protection rated up to 450°F for styling tools
• Creates an insulating film to reduce thermal stress
• Improves slip to decrease friction from brushes and irons

Will it control frizz in humid conditions and for how long?

The formula is designed to resist moisture intrusion and keep hair smoother in humid environments. It provides measurable frizz control throughout the day, helping hair appear sleeker even in up to 80% humidity when used as directed.

• 24‑hour frizz management when applied to damp hair
• Helps maintain style shape and reduce flyaways
• Compatible with humid and dry climates for consistent results

What benefits do the oils in the formula add to the hair?

Argan, marula and camellia oils are included for their lightweight emollient and smoothing properties. They hydrate, add shine and help fortify fragile sections without leaving a heavy residue, so fine hair maintains volume while gaining resilience.

• Argan oil: nourishes and boosts shine without weighing hair down
• Marula oil: restores softness and improves manageability
• Camellia oil: smooths the cuticle to reduce tangles and breakage

How do you use the Chronologiste Hair Serum for best results?

Apply to freshly towel‑dried hair after shampoo and mask for even distribution and optimal performance. Work through mid‑lengths to ends, leave in, then blow‑dry and finish with hot tools as needed—no rinse required.

• Use after Chronologiste shampoo and mask for a complete regimen
• Apply a small, even amount to damp hair focusing on lengths and ends
• Blow‑dry and style; safe to reapply sparingly for touchups on dry hair

Who is this for: This serum suits anyone with dry, damaged, brittle or mature hair seeking protection from heat styling and improved smoothness. It’s especially helpful for fine hair that needs lightweight conditioning without losing body, as well as for textured or chemically treated hair that requires extra protection and shine during routine styling.

Ingredients

Water, Beeswax, Dimethicone, Isopropyl Myristate, Phenoxyethanol, Hydroxypropyl Guar, Peg-40 Hydrogenated Castor Oil, Triethanolamine, Hydroxyethylcellulose, Caprylyl Glycol, Dimethiconol, Peg-30 Glyceryl Stearate, Hydrogenated Styrene/Butadiene Copolymer, Ethylhexylglycerin, Benzyl Salicylate, Hexyl Cinnamal, Acrylates/C10-30 Alkylacrylate Crosspolymer, Benzyl Alcohol, Disodium Stearoyl Glutamate, Limonene, Citronellol, Tocopherol, Bisabolol, Sodium Hyaluronate, Safflower Glucoside, Geraniol, Hydroxycitronellal, Coumarin, Butylene Glycol, Peg-30 Dipolyhydroxystearate, Trideceth-6, Linalool, Farnesol, Alteromonas Ferment Extract, Sodium Citrate, Parfum/Fragrance, C243628/1.