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Kerastase

Discipline Kératine Thermique

Heat protectant / Lotion, medium-weight

Heat protectant
cream
Sulfate-free
Not cruelty-free · PETA-listed

Size5.1 fl oz

Price$46seen at one store · 5.1 oz

Price / oz$9.02/ozat 5.1 oz

Where to buy1 store

Scent:

The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.

Manufacturer page: kerastase.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types Straight–Curly Not in your profile

Moisture level Moderate Not in your profile

Oils and butters None Not in your profile

Slip / detangling Moderate Not in your profile

Weight on hair Medium Not in your profile

Fragrance Present Not in your profile

Protein Minor Not in your profile

Silicone / wax buildup High Not in your profile

Clarifying wash needed Moderate Not in your profile

Parabens / preservatives None of these listed Not in your profile

Show all 20 factors we check

The rest of what your plan weighs on this product.

Essential oils None listed Not in your profile

Fast-drying alcohol None Not in your profile

Vegan / cruelty-free Not cruelty-free · PETA-listed Not in your profile

Animal-derived ingredients Not yet verified Not in your profile

Heavy humectants Not heavy Not in your profile

Hard-water defence None Not in your profile

UV filter None listed Not in your profile

Ingredient list 25 ingredientsAbout average Not in your profile

Price tier Prestige Not in your profile

Where to buy it SalonsOne channel Not in your profile

The consultation builds your hair profile, then reads every factor in this table against it — and tells you where this product fits, or what to use instead.

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

Same job for less elsewhere

$9.02/oz at 5.1 oz — more than 86% of the 223 heat protectants , which mostly run $2.25–7.40/oz.

View alternatives

Great for

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

Maybe skip if

this product carries a scent

Curly-method routinesthese silicones need a detergent to remove

Vegan and cruelty-freeour record does not support both claims here

Tight budgetsit sits in the upper price tiers

Picking it up locallywe have it recorded in one channel only

How much heat protection you need depends on how often and how hot you style — that is what the consultation works out.

What the formula actually does

Read from the label, not the marketing

Each row says where it comes from: F means we derived it from this product’s own ingredient list, S means it is a claim the brand makes that the formula neither confirms nor contradicts.

Weight on the hair Medium

Middle of the range — noticeable on fine hair, light on coarse hair.

Slip and detangling Moderate

Conditioning agents are present, lower in the list.

Needs detergent to remove Yes

Water-insoluble silicones or waxes: a detergent wash is what removes them.

Water-binding (humectants) Moderate

Humectants in the working part of the formula.

Fast-drying alcohol None

No fast-drying alcohol in the list.

Fragrance Present

Fragrance is listed; it sits below the working ingredients.

from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.

Ingredients that matter

The ingredients that change a decision

The workhorse ingredients plus anything lower down that changes a decision. These chips name what an ingredient does — they are not safety scores, and no ingredient here is rated good or bad on its own.

Ingredient	What it does	Why it matters	Chip
WaterAqua (Water)	solvent	The base everything else is dissolved in	Neutral
C13-16 Isoparaffin	emollient	Softens and smooths the strand	Softens
Dimethicone	silicone	Spreads heat across the strand	Buildup
Polyacrylamide	film former	Lays down the film that holds a shape	Holds
C13-14 Isoparaffin	emollient	Softens and smooths the strand	Softens
Phenoxyethanol	preservative	Keeps the product from spoiling	Stabilizes
Amodimethicone	silicone	A little heat-spreading smoothing	Buildup
Laureth-7	emulsifier	Stabilises the mix	Stabilizes
Benzyl Salicylate	fragrance	The scent	Fragrance
Hydroxypropyltrimonium Hydrolyzed Wheat Protein	conditioning agent	Adds slip, lower in the list	Protein
Linalool	fragrance	The scent	Fragrance
Alpha-Isomethyl Ionone	fragrance	The scent	Fragrance

What the list leaves out, and what it carriesThe list carries no sulfates or drying alcohols. Fragrance is on the label. Water-insoluble silicones — needs a detergent wash to remove.

Full ingredient list (25)

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

1 Water · Aqua (Water)

General function
The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.
- solvent
2 C13-16 Isoparaffin

General function
A branched hydrocarbon of the stated chain length. It spreads other ingredients thinly and evaporates, leaving the hair without added weight.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitFrizz-prone, damaged, or high-friction hair
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- emollient
- solvent
3 Dimethicone

General function
The most common conditioning silicone. It coats the strand for shine, slip, and frizz control, and needs a detergent (not just water) to wash out.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.

May not suitBuild-up-sensitive routines
Dimethicone does not disperse in water. On a routine that skips detergent it stays on the hair and accumulates wash after wash.
- silicone
- emollient
- conditioning agent
4 Polyacrylamide

General function
A thickening polymer that also leaves a light film, used in gels and styling creams.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitClimate-sensitive or frizz-prone hair
A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.

May suitMaximum-hold styling
Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.

DependsBuild-up-sensitive routines
Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.
- film former
- polymer
- thickener
5 C13-14 Isoparaffin

General function
A light carrier used to spread silicones and polymers thinly.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitFrizz-prone, damaged, or high-friction hair
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- emollient
- solvent
▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
6 Phenoxyethanol

General function
The most common modern preservative; it keeps the product free of bacteria and mould. It sits well below 1% of the formula.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChem
- preservative
7 Amodimethicone

General function
A silicone modified to stick where hair is damaged, so it smooths selectively instead of coating everything. It resists rinsing more than plain dimethicone.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Amino-functional silicone carries a positive charge, so it binds where the cuticle is worn rather than coating evenly. Damaged areas get most of it.

May suitMaximum-hold styling
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

International Journal of Trichology
- silicone
- conditioning agent
- film former
8 Laureth-7

General function
An emulsifier that keeps silicones and oils dispersed in water.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
- emulsifier
- solubilizer
9 2-Oleamido-1,3-Octadecanediol

General function
A ceramide-like lipid used to reinforce the outer surface of damaged hair.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFrizz-prone, damaged, or high-friction hair
Restoring surface lipids lowers friction between strands, which is where much of the roughness in damaged hair comes from.

May suitProtein-sensitive hair
A lipid, not a protein, despite sitting alongside proteins in most repair claims. It does not carry the stiffening effect.

May suitVery dry or highly damaged hair
Ceramides are the lipid class bleaching and heat deplete. Replacing them works on the surface layer rather than adding protein stiffness.
- ceramide
- emollient
10 Benzyl Salicylate

General function
A soft floral fragrance component listed separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
11 Trideceth-5
- emulsifier
12 Arginine

General function
An amino acid that holds water and carries a positive charge, so it is drawn to damaged spots on the strand.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitVery dry or highly damaged hair
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

DependsProtein-sensitive hair
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

PubChem
- amino acid
- humectant
13 Glutamic Acid

General function
An amino acid used for moisture binding and to bring the formula to an acidic pH.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitVery dry or highly damaged hair
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

DependsFrizz-prone, damaged, or high-friction hair
pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.

DependsProtein-sensitive hair
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

PubChem
- amino acid
- pH adjuster
14 Chlorhexidine Digluconate
- preservative
15 Benzyl Alcohol
- preservative
- solvent
16 Serine

General function
One of the amino acids that make up hair protein, added for water binding.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitVery dry or highly damaged hair
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

DependsProtein-sensitive hair
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
- amino acid
17 Hydroxypropyltrimonium Hydrolyzed Wheat Protein

General function
A wheat protein given a positive charge so it sticks to damaged areas. It conditions and adds temporary strength in one ingredient.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFrizz-prone, damaged, or high-friction hair
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

May suitMaximum-hold styling
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

May suitVery dry or highly damaged hair
Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.
- conditioning agent
- film former
- protein
- hydrolysed protein
18 Trideceth-10
- emulsifier
- solubilizer
19 Linalool

General function
A floral fragrance component listed separately as a recognised contact allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
20 Xylose

General function
A plant sugar used as a light humectant, often alongside other sugar-derived moisturisers.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitDry, coarse, or high-porosity hair
High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

May suitVery dry or highly damaged hair
Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

DependsClimate-sensitive or frizz-prone hair
A humectant moves water in whichever direction the air allows: it holds moisture in humid conditions and can pull it back out of hair in very dry ones.
- humectant
21 Alpha-Isomethyl Ionone

General function
A violet-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
22 Geraniol

General function
A rose-scented fragrance component, listed on its own because some people react to it.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.
- fragrance
- named fragrance allergen
23 Citronellol

General function
A rose-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
24 Cinnamyl Alcohol

General function
A soft cinnamon-floral fragrance component named as a recognised allergen.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.
- fragrance
- named fragrance allergen
25 Fragrance · Parfum (Fragrance)

General function
An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May not suitFragrance-sensitive routines
Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance

What the whole list adds up to

7 fragrances
6 named fragrance allergens
4 solvents
4 emollients
3 film formers
3 preservatives
3 emulsifiers
3 amino acids
2 silicones
2 conditioning agents
2 solubilizers
2 humectants
1 polymer
1 thickener

Ingredient list captured 2026-09-03. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 5.1 oz

Seen at $46 1 store · checked Sep 3

Good value under $8 Under $1.66/oz it costs less than three-quarters of the 8 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $8 line; products that do this job typically go for about $9 at this size.

Show the price ladder

Price for 5.1 ozlower is better

Where we’ve seen it1 listing · 1 store

Joncen Phi Salon (joncenphi.com)
$46.00

5.1 oz · $9.02/oz

Sep 3Lowest per oz

Sorted by price per ounce. Dated observations from our research, not live prices. Direct store pages, no affiliate links. We don’t sell this product.

How we work this out

5.1 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
Seen at $46 is the price we have observed for the 5.1 oz. We need three stores before we call a price commonly seen.
Good value under $8 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $1.66/oz; at 5.1 oz that is $8. Under that line you are paying less than most of them.
About $9 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 5.1 oz.

Formula

Formula score

8 of 10

Sold through salons at a price 5 products that do the same job undercut — the distribution is part of what you are paying for.

How the score is counted

5 products that do the same job cost less per ounce
Costs more per ounce than 86% of the 223 heat protectants we’ve priced
Covers 5 of the 6 things a heat protectant should do
Prestige tier, sold at Salons

A film-forming heat spreaderSilicones or polymers that spread heat along the strand.3 pts
A stated heat claimThe brand names the protection it claims.2 pts
A light baseWater or a volatile carrier first, so it does not weigh hair down.2 pts
A humectantBinds water into the hair.1 pt
Slip for detanglingReduces the force it takes to comb wet hair.1 pt
Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score is completeness for the job: the share of the systems this product type is normally built around that we can find in this list, weighted. It is not efficacy, not quality, and it never compares across product types.

Does the same job, for less

Same derived functions — what it cleans, conditions, coats or holds — at a lower cost per ounce. Scent, texture and where you buy it can still differ.

MielleLowest cost per oz Heat Protectant Near Me Mongongo Oil Heat Protectant Spray For $1.25/oz $7.77/oz less

Alcohol-free
Medium weight
Budget

· Close function

Function: Slip and detangling
Oils and butters
Also: Drugstore tier
4 oz bottle

Compare

MielleClose function Mongongo Oil Thermal & Heat Protectant Spray $1.92/oz $7.10/oz less

Heat protect
Alcohol-free
Medium weight

Function: Slip and detangling
Oils and butters
Also: Sweet scent
Drugstore tier
4 oz bottle

Compare

OGXLighter feel Bond Protein Repair Heat Protect Multi-Tasker Spray $1.73/oz $7.29/oz less

Lightweight
Alcohol-free
Budget

· Close function

Function: Film formers
Weight on the hair
Also: Drugstore tier
6.5 oz bottle

Compare

See more alternatives in the product library

These are functional neighbours, not personal recommendations — they are close on formula, not chosen for anyone. Get the one that fits your hair, routine, and budget

Final decision

Should you buy it?

Hard to justify at this price

Best user

Porous or damaged hair, looking for ceramides on the cuticle and a formula with no drying alcohol

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, curly-method routines, or vegan and cruelty-free shopping

Best alternative if not

Mielle Heat Protectant Near Me Mongongo Oil Heat Protectant Spray For — for similar results at a lower price

We do not sell products or take placement fees. This page states what the formula and the prices show; the consultation is what matches it to a person.

Claims check

What the brand says, against what the formula shows

Claims are quoted from the brand. We only mark one supported, partly supported, or conflicting when the ingredient list actually speaks to it; everything else stays "stated by the brand", which is not a criticism — most claims simply cannot be read off a label.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

Thermo-protection up to 180°C

Heat protection is a performance claim; an ingredient list cannot confirm it.

Dimethicone
Polyacrylamide
Amodimethicone

Stated by brand

Only lab testing can show this.

Hair is strengthened, breakage is reduced

Protein or ceramides are present, but low enough that this reads as support, not treatment.

2-Oleamido-1,3-Octadecanediol
Arginine
Glutamic Acid

Partly supported

Supports the surface, not a treatment.

Anti-frizz/anti-humidity action

Humidity resistance is measured in a lab, not read off a label; film formers can help.

Dimethicone
Polyacrylamide
Amodimethicone

Stated by brand

May help, but not measurable here.

Shiny and perfect glazed-like finish

The formula carries a recognised shine system — silicone, oil, or light ester.

Dimethicone
Amodimethicone

Supported

Reflects light for visible shine.

Facilitates blowdry & reduces styling time

This is a marketing claim; an ingredient list cannot speak to it.

—

Stated by brand

Can’t be confirmed from label.

Smoothes & tames hair fiber

This is a marketing claim; an ingredient list cannot speak to it.

—

Stated by brand

Can’t be confirmed from label.

How to read this

We look at the first 10–15 ingredients and what they do in a formula — not marketing. If the list doesn't speak to a claim, we don't assume.

How this page was made

Everything above is generated from our researched product record — identity, the ingredient list as printed, the brand's own claims, dated price observations, and review themes written in our researchers' own words. No part of this page is written per product.
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.
Both scores out of ten are defined on this page. The formula score is completeness for the job, computed from a fixed per-format checklist shown beneath the gauge; the price score is cost per ounce against every product of this type we have priced.
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.
6 sources consulted for this product (3 manufacturer or regulatory, 3 retailer, 0 editorial), last checked 2026-09-03.
Ingredient references are linked for 7 of 18 product-aware annotations on this page. Fit notes are conditional formulation guidance, not a conclusion about the finished product or about you.
We have not tested this product in a lab and we do not physically test your hair. Formula readings come from the ingredient list; behaviour claims are labelled as the brand's.
Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice.
Ingredient names link to our ingredient library, where each entry shows what it does, which product types use it, and where it usually sits on a label across everything we have researched.
This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
Formula readings: derivation v22. Record last updated 2026-09-05.

Discipline Kératine Thermique

Is this right for you?

Read from the label, not the marketing

The ingredients that change a decision

What the whole list adds up to

Should you buy it?

What the brand says, against what the formula shows

More from Kerastase

How this page was made

Your personalized hair plan