Does it repair split ends?

No shampoo seals a split end permanently. It strengthens the hair fiber to slow new breakage, and trimming remains the only fix for splits you already have.

How does it differ from Olaplex No.4?

Olaplex rebuilds broken bonds with bis-amino diglycine; this uses creatine R and taurine to reinforce the fiber. Olaplex suits chemically damaged hair, this suits long hair that breaks and splits.

Do I need the matching conditioner?

Reviewers who saw the clearest results used the Resistance conditioner or mask alongside it. On its own the shampoo cleans and softens but the strengthening effect is milder.

Is it safe for color-treated hair?

Kérastase positions it for all hair types, but it uses standard sulfate cleansers. If your color fades quickly or your hair is very dry, a sulfate-free shampoo may suit you better.

How often should I use it?

It is a daily shampoo, so use it as often as you wash. Massage into wet hair, rinse, and follow with conditioner on the lengths.

What is in the bottle?

One 8.5 fl oz (250 ml) squeeze bottle of shampoo. No conditioner or treatment is included.

Kérastase

Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml

Best price now

$29.99at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

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Kérastase

Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml

Best price now

$29.99at WalmartChecked 1 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Lowest price today: $29.99 at Walmart (checked Nov 15, 2026).

Our take on the Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml

A daily strengthening shampoo from Kérastase's Resistance line, built around creatine R, taurine and ceramides to reinforce weak, breakage-prone lengths. It is aimed at long hair that splits and snaps rather than at scalps or volume. Compared with bond-builders like Olaplex, it works as a maintenance wash rather than a repair treatment, and it lathers and rinses cleanly without weighing hair down. Reviewers with fine, fragile hair rate it well; those expecting dramatic regrowth or a strong scent are less impressed.

Best forLong hair prone to split ends and breakageFine or fragile hair that snaps when brushedDaily washing for damaged, over-processed lengthsAnyone already using the Resistance line

Pros

Creatine R, taurine and ceramides target breakage along the length
Lathers well and rinses clean without heaviness
Leaves hair softer and easier to detangle
Works as a daily wash, not a weekly treatment
Unisex formula for all hair types

Cons

No bond-rebuilding ingredients, so it maintains rather than repairs
Unscented formula feels plain next to other Kérastase shampoos
Results build slowly and depend on pairing with the matching conditioner
Sulfate-based cleansers can feel stripping on very dry or color-treated hair

Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml prices at every store

WalmartNew
In stockSold by Easy EaglesReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$29.99+ $5.99 shippingChecked 1 h ago
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Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml price history

Lowest price we've seen: $29.99 on Nov 15 at Walmart. Tracked across 1 store since Nov 15.

What reviewers say

4.3 / 596 ratings

Owners with long, breakage-prone hair report less shedding and fewer split ends after several weeks of regular use, and many say it leaves hair soft and manageable. Critics find it overpriced for a sulfate shampoo and say the effect is modest without the matching conditioner.

What people mention

BreakagePraisedRegular users say hair snaps less and split ends appear more slowly over weeks of use.
SoftnessPraisedMany owners say hair feels softer and is easier to detangle after washing.
ResultsMixedSome find the strengthening effect subtle and slow, noticeable only with the matching conditioner.
DryingCriticisedA few with very dry or color-treated hair say it leaves lengths feeling stripped.
ScentCriticisedThe unscented formula is called plain by shoppers used to fragranced Kérastase shampoos.

About the Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml

Kérastase Resistance Bain Extentioniste is a daily strengthening shampoo from the Resistance line. It is made for all hair types and helps strengthen hair and repair split ends.

The formula contains Creatine R, ceramides and taurine. It comes in an 8.5 oz (250 ml) squeeze bottle.

Brand: Kérastase
Product line: Resistance
Type: Daily shampoo
Hair type: All hair types
Key benefits: Strengthening and split end repair
Active ingredients: Creatine R, ceramides, taurine
Scent: Unscented
Form: Liquid
Size: 8.5 oz / 250 ml
Container: Bottle with squeeze dispenser
Weight: 8.5 oz
Gender: Unisex
Age group: Adult
Storage: Store in a cool, dry place
Manufacturer: L'Oréal

Specifications

size: 5.550Source
Brand: KérastaseSource
Hair type: All Hair TypesSource
Shampoo & conditioner type: Daily ShampoosSource

Questions and answers

Does it repair split ends?: No shampoo seals a split end permanently. It strengthens the hair fiber to slow new breakage, and trimming remains the only fix for splits you already have.
How does it differ from Olaplex No.4?: Olaplex rebuilds broken bonds with bis-amino diglycine; this uses creatine R and taurine to reinforce the fiber. Olaplex suits chemically damaged hair, this suits long hair that breaks and splits.
Do I need the matching conditioner?: Reviewers who saw the clearest results used the Resistance conditioner or mask alongside it. On its own the shampoo cleans and softens but the strengthening effect is milder.
Is it safe for color-treated hair?: Kérastase positions it for all hair types, but it uses standard sulfate cleansers. If your color fades quickly or your hair is very dry, a sulfate-free shampoo may suit you better.
How often should I use it?: It is a daily shampoo, so use it as often as you wash. Massage into wet hair, rinse, and follow with conditioner on the lengths.
What is in the bottle?: One 8.5 fl oz (250 ml) squeeze bottle of shampoo. No conditioner or treatment is included.
Where is the Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml cheapest?: At Walmart, for $29.99, as of our latest check.
What do buyers say about the Kerastase Resistance Bain Extentioniste Shampoo - 8.5oz / 250ml?: Rated 4.3 out of 5 from 96 ratings.