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Side by side

Kerastase Discipline Kératine Thermique vs Kerastase Premiere Filler Fondamental Repairing Anti-Frizz Serum

74% function match · 7 of the 10 functions we compared match Formula overlap 47%. Kerastase Discipline Kératine Thermique and Kerastase Premiere Filler Fondamental Repairing Anti-Frizz Serum share 2 ingredients among each other's most prominent.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • Discipline Kératine Thermique — porous, damaged hair
  • Premiere Filler Fondamental Repairing Anti-Frizz Serum — a wide range of hair

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
Kerastase

Discipline Kératine Thermique

  • Heat protectant
  • Prestige
  • Sulfate-free
Kerastase

Premiere Filler Fondamental Repairing Anti-Frizz Serum

  • Heat protectant
  • Prestige
  • Sulfate-free
Price, size & price per ounce
$46 5.1 oz · $9.02/oz
$46 3.04 oz
Value / price positioning
Same job for less elsewhere $$$$$ Prestige tier · costs more than 86% of the 223 heat protectants we’ve priced
Not enough priced heat protectants to place it Prestige tier
Best for hair types
Straight–Curly Smoothing and thermal products span straight through curly hair. Your hair
Straight–Curly Smoothing and thermal products span straight through curly hair. Your hair
Moisture level Differs
Moderate Humectants in the working part of the formula. Your hair
None found No humectants found — nothing here pulls water into the hair. Your hair
Oils and butters Same
None No oils or butters in the list. Your hair
None No oils or butters in the list. Your hair
Slip / detangling Same
Moderate Conditioning agents are present, lower in the list. Your hair
Moderate Conditioning agents are present, lower in the list. Your hair
Weight on hair Same
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Fragrance
Present Fragrance is listed; it sits below the working ingredients. Your hair
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Protein Same
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Silicone / wax buildup Same
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
Moderate Your hair
Moderate Your hair
Fast-drying alcohol Differs
None No fast-drying alcohol in the list. Your hair
Present Fast-drying alcohol is present — it speeds drying and can read dry on the hair. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Covers the core
Who should choose this
  • Porous, damaged hairceramides are in the list
  • Very dry hairno fast-drying alcohol in the list
  • A wide range of haira middle-of-the-range weight
  • A wide range of haira middle-of-the-range weight
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Vegan and cruelty-freeour record does not support both claims here
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Very dry or damaged hairit contains fast-drying alcohol
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Heat protectantcream
Heat protectantserum
Where to buy
Salons
Salons · Brand website
Free of
  • sulfate-free
  • sulfate-free
Cruelty-free
Not cruelty-free · PETA-listed
Cruelty-free · label states
Scent
Scented, not described
Scented, not described

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

Take the consultation

$49.00 once, for your consultation and hair profile. No subscription, no required purchases.

The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientDiscipline Kératine ThermiquePremiere Filler Fondamental Repairing Anti-Frizz Serum
Water
Neutral
#1Leading
#1Leading
Dimethicone
Buildup
#3Leading
#3Leading
Phenoxyethanol
Stabilizes
#6Below the 1% line
#7Below the 1% line
Amodimethicone
Buildup
#7Below the 1% line
#5Below the 1% line
Benzyl Salicylate
Fragrance
#10Below the 1% line
#22Below the 1% line
Linalool
Fragrance
#19Below the 1% line
#18Below the 1% line
Alpha-Isomethyl Ionone
Fragrance
#21Below the 1% line
#26Below the 1% line
Fragrance
Fragrance
#25Below the 1% line
#6Below the 1% line

What only one of them carries

Discipline Kératine Thermique

Premiere Filler Fondamental Repairing Anti-Frizz Serum

Full ingredient list — Discipline Kératine Thermique (25)
Full ingredient list — Premiere Filler Fondamental Repairing Anti-Frizz Serum (28)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsDiscipline Kératine ThermiquePremiere Filler Fondamental Repairing Anti-Frizz Serum
Supported
1
1
Partly supported
1
1
Stated by brand
4
3
Potential conflict
0
0

Discipline Kératine Thermique

  • Thermo-protection up to 180°CStated by brandOnly lab testing can show this.
  • Hair is strengthened, breakage is reducedPartly supportedSupports the surface, not a treatment.
  • Anti-frizz/anti-humidity actionStated by brandMay help, but not measurable here.
  • Shiny and perfect glazed-like finishSupportedReflects light for visible shine.
  • Facilitates blowdry & reduces styling timeStated by brandCan’t be confirmed from label.
  • Smoothes & tames hair fiberStated by brandCan’t be confirmed from label.

Premiere Filler Fondamental Repairing Anti-Frizz Serum

  • Protects hair from heat damage up to 450°FStated by brandOnly lab testing can show this.
  • Reduces appearance of split endsPartly supportedSupports the surface, not a treatment.
  • 99% stronger hair; 85% shinier hairStated by brandOnly the brand’s testing shows this.
  • Smooths frizz for up to 72 hoursSupportedSmoother strands, less frizz.
  • Up to 3x smoother and 2x softer hairStated by brandOnly the brand’s testing shows this.

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

Discipline Kératine Thermique

Against 223 heat protectants with a computable unit price.

Value readDiscipline Kératine ThermiquePremiere Filler Fondamental Repairing Anti-Frizz Serum
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Not enough priced heat protectants to place itWe need more comparable products before we can place this.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

Discipline Kératine Thermique vs Heat Protectant Near Me Mongongo Oil Heat Protectant Spray ForMielle · 90% function matchPremiere Filler Fondamental Repairing Anti-Frizz Serum vs Résistance Extentioniste ThermiqueKerastase · 86% function matchDiscipline Kératine Thermique vs Mongongo Oil Thermal & Heat Protectant SprayMielle · 90% function matchPremiere Filler Fondamental Repairing Anti-Frizz Serum vs Resistance Heat Protecting Leave-In Treatment for Split EndsKerastase · 86% function matchDiscipline Kératine Thermique vs Bond Protein Repair Heat Protect Multi-Tasker SprayOGX · 88% function matchPremiere Filler Fondamental Repairing Anti-Frizz Serum vs Nutritive Nectar Thermique Beautifying Anti-frizz Blow Dry MilkKerastase · 86% function matchDiscipline Kératine Thermique vs Repair & Protect Bond Protein Repair 450F Heat Protectant SprayOGX · 88% function matchPremiere Filler Fondamental Repairing Anti-Frizz Serum vs Nutritive Nectar Thermique Heat Protecting CreamKerastase · 86% function match

Discipline Kératine Thermique · Premiere Filler Fondamental Repairing Anti-Frizz Serum · All heat protectants in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
  • The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
  • 7 sources were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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