KÉRASTASE Resistance Masque Extentioniste Strengthening Hair Mask 6.8 fl oz — Repairs Breakage & Seals Split Ends

KÉRASTASE Resistance Masque Extentioniste is a strengthening hair mask formulated with amino acids, Gluco Peptide, wheat protein, and native plant cells to fortify damaged lengths, seal split ends, and support visibly stronger, longer hair.

Designed for weakened, brittle, or chemically treated hair, this rinse-out mask focuses care on mid-lengths and ends where breakage and split ends compromise growth. The rich formula hydrates and smooths the hair fiber while proteins rebuild internal strength; it pairs best with other Extentioniste products for a complete regimen that targets breakage and encourages healthier-looking lengths.

How does this masque repair and protect damaged lengths?

The masque deposits targeted conditioning ingredients that reinforce the hair fiber, helping reduce breakage from weak mid-lengths and ends. It smooths the surface cuticle to lower friction and tangling, which keeps fragile strands intact between washes.

• Contains Gluco Peptide and wheat protein to strengthen internal structure.
• Enriched with native plant cells for surface smoothness and shine.
• Rinse-out treatment that reduces tangles and friction-related breakage.

Will it help with split ends and longer hair growth?

The formula is designed to seal and reinforce existing split ends visually and reduce the rate of new breakage, which supports retention of length over time. While a topical mask cannot regrow hair at the follicle, minimizing breakage helps hair appear longer and healthier.

• Seals and smooths end fibers to improve appearance of split ends.
• Prevents further breakage so hair can retain length more easily.
• Works best when used regularly with Extentioniste Shampoo and Conditioner.

How should I use the mask for best results?

Apply the masque after shampooing and towel-drying hair to remove excess water; distribute a quarter-size amount from mid-lengths to ends and leave on for 5–10 minutes before rinsing. For intensive results, follow the frequency recommended for your hair condition—weekly for moderately damaged hair or more regularly if hair is very weakened.

• Use on clean, towel-dried hair for even application and absorption.
• Leave 5–10 minutes to allow proteins and peptides to penetrate the fiber.
• Combine with Extentioniste Shampoo and Conditioner for a full strengthening program.

Is this suitable for my hair type and styling routine?

The masque is formulated for all hair types that show signs of damage, brittleness, or frequent breakage—safe for colored and chemically treated hair when used as directed. It won’t weigh hair down when rinsed thoroughly and provides a smoother base for heat styling or protective braids.

• Suitable for all hair textures, including fine, medium, and thick strands.
• Compatible with color-treated hair when used post-wash and rinsed well.
• Improves manageability for styling and reduces friction from brushing.

Who this is for: If your hair breaks before it grows to your desired length, shows visible split ends, feels brittle along the lengths, or needs a strengthening boost after color or chemical services, this KÉRASTASE Resistance Masque Extentioniste is designed to fortify and smooth those strands. It suits anyone seeking a high-performance salon-grade mask to support healthier-looking lengths while maintaining shine and manageability.

Ingredients

Water, Hydroxypropyl Starch Phosphate, Quaternium-87, Stearyl Alcohol, Behentrimonium Chloride, Propylene Glycol, Amodimethicone, Caprylyl Glycol, Isopropyl Alcohol, Candelilla Cera/Candelilla Wax, 2-Oleamido-1,3-Octadecanediol, Trideceth-6, Arginine, Glutamic Acid, Chlorhexidine Digluconate, Limonene, Serine, Hydroxypropyltrimonium Hydrolyzed Wheat Protein, Benzyl Salicylate, Benzyl Alcohol, Citronellol, Hexyl Cinnamal, Cetrimonium Chloride, Geraniol, Glycerin, Trehalose, Tamarindus Indica Seed Polysaccharide, Myrothamnus Flabellifolia Leaf Extract, Fragrance.