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Kérastase Elixir Ultime vs OLAPLEX No.7 Oil

Both are finishing oils in a silicone base for shine, frizz and heat. Elixir Ultime is built on camellia oil with argan and marula, and comes in a refillable bottle. Olaplex No.7 carries the brand's bond builder, bis-aminopropyl diglycol dimaleate, with moringa and pomegranate oils and a UV filter, in a bottle less than half the size.

Kérastase Elixir Ultime L'Huile Originale costs 20% less per ounce: $25.24 / fl oz against $31.55 / fl oz.

Kérastase

Elixir Ultime L'Huile Originale

$64

What it is
Hair oil
Size
75 ml, $25.24 / fl oz
On Amazon
Sold by Kérastase
Amazon best sellers
#2 in Hair Styling Oils

Buy on Amazon

OLAPLEX

No.7 Bonding Oil

$32

What it is
Hair oil
Size
30 ml, $31.55 / fl oz
On Amazon
Sold by Amazon.com
Amazon best sellers
#5 in Hair Treatment Oils

Buy on Amazon

Which one

Kérastase Elixir Ultime if you want the plant oils: camellia, argan and marula.

OLAPLEX No.7 Oil if you already use Olaplex and want its bond builder in the last step.

Or a dupe for either

  1. Herbal Essences Lightweight Hair Oil with Aloe & Camellia

    for Kérastase Elixir Ultime L'Huile Originale

    $9.99vs $64−88% per oz

    $3.11 / fl oz against $25.24 / fl oz. Both list Camellia oil.

    #26 in Hair Styling Oils on Amazon

    Same camellia oil (Camellia oleifera seed oil) and dimethiconol over a fast-evaporating base, used the same way: one or two pumps on damp or dry ends.

    What it does worse: It carries one plant oil where Kérastase layers six, adds denatured alcohol, and makes no heat-protection claim, so use a separate protectant before hot tools.

    Buy the dupeFull comparison

  2. Garnier Fructis Sleek & Shine Anti-Frizz Serum

    for OLAPLEX No.7 Bonding Oil

    $6.97 $7.99vs $32−96% per oz

    $1.37 / fl oz against $31.55 / fl oz.

    #1 in Hair Styling Serums on Amazon

    Same silicone shine oil: a volatile carrier (isohexadecane and isoparaffin in Olaplex, cyclopentasiloxane in Garnier) evaporates and leaves dimethicone or dimethiconol to smooth the cuticle, with a little plant oil.

    What it does worse: Olaplex adds its patented bond builder, a UV filter and moringa, pomegranate and sunflower oils, while Garnier keeps to argan and apricot kernel oils and fragrance.

    Buy the dupeFull comparison

Questions

What is the difference between Kérastase Elixir Ultime and OLAPLEX No.7 Oil?

Both are finishing oils in a silicone base for shine, frizz and heat. Elixir Ultime is built on camellia oil with argan and marula, and comes in a refillable bottle. Olaplex No.7 carries the brand's bond builder, bis-aminopropyl diglycol dimaleate, with moringa and pomegranate oils and a UV filter, in a bottle less than half the size.

Which is cheaper, Kérastase Elixir Ultime or OLAPLEX No.7 Oil?

Kérastase Elixir Ultime L'Huile Originale costs 20% less per ounce: $25.24 / fl oz against $31.55 / fl oz.

Is there a dupe for Kérastase Elixir Ultime?

Herbal Essences Lightweight Hair Oil with Aloe & Camellia, about $9.99, 88% less. Same camellia oil (Camellia oleifera seed oil) and dimethiconol over a fast-evaporating base, used the same way: one or two pumps on damp or dry ends. It carries one plant oil where Kérastase layers six, adds denatured alcohol, and makes no heat-protection claim, so use a separate protectant before hot tools. About an eighth of the price per ounce.

Is there a dupe for OLAPLEX No.7 Oil?

Garnier Fructis Sleek & Shine Anti-Frizz Serum, about $6.97, 96% less. Same silicone shine oil: a volatile carrier (isohexadecane and isoparaffin in Olaplex, cyclopentasiloxane in Garnier) evaporates and leaves dimethicone or dimethiconol to smooth the cuticle, with a little plant oil. Olaplex adds its patented bond builder, a UV filter and moringa, pomegranate and sunflower oils, while Garnier keeps to argan and apricot kernel oils and fragrance. Five times the bottle for under a quarter of the price.

Amazon prices as of Oct 1, 2026, 12:33 PM ET, subject to change: the price on Amazon at checkout is the one that applies.