Kerastase Resistance Masque Extentioniste
- 5-10 minutes leave-on, mid-lengths to ends
- Quarter size amount on towel-dried hair
- Gluco peptide, wheat protein, native plant cells
- Targets split ends and breakage
- Pairs with Extentioniste shampoo and conditioner
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A strengthening mask for long, brittle hair that targets split ends and breakage. It contains wheat protein, so anyone avoiding gluten should check before use.
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ASIN: B07D594C5KCategory: Hair Masks
Overview
Kerastase built the Extentioniste mask to strengthen lengths that break before they grow long, using gluco peptide, wheat protein and plant cells. You apply it to towel-dried hair from mid-length to ends and rinse after a short wait.
Strengthening the lengths and sealing split ends suits anyone growing hair out. It slots into the Resistance range for a full routine. Wheat protein rules it out for those avoiding gluten.
Who it's for
People growing out damaged, brittle hair suit the length-focused formula. Those with a fine, oily scalp should keep it off the roots.
Pros and cons
- Targets split ends
- Protein strengthens lengths
- Small dose per use
- Leaves hair soft and shiny
- Contains wheat protein
- Volume missing from specs
Performance notes
Proteins bind to weak spots along the lengths, which reduces breakage as hair grows. Towel drying first lets more mask reach the fiber. Leave-on time controls how much strengthening you get.
Specifications
| Brand | Kerastase |
|---|---|
| Hair Type | All, weakened and damaged |
| Special Ingredients | Gluco Peptide, Wheat Protein, Native Plant Cells |
| Hair Conditioner Type | Strengthening hair mask |
| Product Benefits | Strengthens lengths, repairs split ends, reduces breakage |
| Suggested Use | Quarter size amount, 5-10 minutes, rinse |
Frequently asked questions
How much Kerastase Extentioniste mask should I use?
A quarter size amount on wet, towel-dried hair, from mid-length to ends.
How long do I leave the Kerastase mask on?
5-10 minutes, then rinse.
Does it contain gluten?
It contains wheat protein, so check the full label if you avoid gluten.
What should I use with it?
Kerastase suggests the Extentioniste shampoo and conditioner.