KÉRASTASE Resistance Extentioniste Thermique Heat-Protecting Cream — 450°F Thermal Defense & Strengthening

KÉRASTASE Resistance Extentioniste Thermique is a leave-in heat-protectant cream that seals split ends and helps strengthen mid-lengths and ends during blow-drying.

This lightweight primer is designed to be applied to wet hair before styling to reduce breakage from heat, enhance shine, and support longer, healthier lengths. Formulated with Creatine R, ceramides and taurine, the formula targets weakened fibers, adds manageability and protects against thermal stress up to 450°F. Use it in combination with the Resistance Extentioniste shampoo and conditioner for a targeted system approach to breakage-prone hair.

How does this cream protect hair during blow-drying?

The Extentioniste Thermique creates a barrier between hot styling tools and the hair fiber, helping to reduce mechanical and thermal damage. Applied to damp hair, it smooths the surface and helps split ends adhere, so strands are less likely to snap during brushing or heat styling.

• Thermo-protection rated to 450°F for high-heat styling
• Formulated to limit breakage from blow-drying when used as directed
• Creates a lightweight coating that smooths cuticles for easier combing

What ingredients make hair stronger and more elastic?

Key actives in the formula focus on rebuilding the fiber from within and reinforcing the surface. Creatine R supports internal structure while ceramides help bond and seal the outer layers, improving elasticity and moisture retention for less fragile lengths.

• Creatine R complex to reinforce hair architecture
• Ceramides to restore and seal the cuticle for shine and resilience
• Taurine to contribute to overall fiber fortification and manageability

How should I apply it for best results?

Dispense a quarter-sized amount into your palms and distribute evenly through damp hair, focusing on mid-lengths and ends where split ends and breakage are most likely. Style as usual with a blow-dryer or heat tool; the primer can be used daily as part of a regular routine.

• Apply to towel-dried hair from mid-lengths to ends
• Use one quarter-sized dose for medium hair, adjust for thickness/length
• Combine with Resistance Extentioniste shampoo and conditioner for a complete regimen

Will this product weigh hair down or leave residue?

The formula is designed as a lightweight leave-in cream so it conditions without heavy buildup when used as directed. It smooths and detangles while maintaining natural movement, making it suitable for daily styling use on weakened lengths.

• Non-greasy texture that absorbs quickly into damp strands
• Leaves hair touchable with improved shine, not stiffness
• Use sparingly on roots to avoid heaviness

Who is this for: KÉRASTASE Resistance Extentioniste Thermique is best suited for people with weakened, breakage-prone hair looking to extend their lengths and reduce split ends. It's especially useful for anyone who regularly uses heat styling and wants a targeted product to protect mid-lengths and ends while improving manageability and shine. Pair it with the full Resistance Extentioniste range when seeking a systemic approach to stronger, longer-looking hair.

Ingredients

Water, Isopropyl Myristate, Dimethicone, Triethanolamine, Amodimethicone, Phenoxyethanol, Carbomer, Polyquaternium-4, Potato Starch Modified, Hydroxypropyl Guar, Behentrimonium Chloride, Trideceth-6, Amyl Cinnamal, Hexyl Cinnamal, Isopropyl Alcohol, Benzyl Alcohol, Linalool, Hydroxycitronellal, Cetrimonium Chloride, Citronellol, Limonene, Benzyl Cinnamate, Creatine, 2-Oleamido-1,3-Octadecanediol, Taurine, Parfum, Fragrance.