MONDAY Haircare

SMOOTH Heat Protectant

Heat protectant / Spray, lightweight

Heat protectant
spray
Sulfate-free
Moisture-rich
Lightweight
Cruelty-free · PETA-listed

Size6 fl oz

Price$6.99 Good valueseen at one store · 6 oz

Price / oz$1.17/ozat 6 oz

Where to buy1 store

Add it to your products. We’ll tell you if it’s ever recalled.

Scent:

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

Manufacturer page: mondayhaircare.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types Straight–Curly Not in your profile

Moisture level High Not in your profile

Oils and butters None Not in your profile

Slip / detangling Moderate Not in your profile

Weight on hair Light Not in your profile

Fragrance Present Not in your profile

Protein Prominent 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 Present Not in your profile

Fast-drying alcohol None Not in your profile

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

Animal-derived ingredients Not yet verified Not in your profile

Heavy humectants Heavy Not in your profile

Hard-water defence High Not in your profile

UV filter None listed Not in your profile

Ingredient list 23 ingredientsAbout average Not in your profile

Price tier Drugstore Not in your profile

Where to buy it Grocery / massOne channel Not in your profile

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

Start your consultation

$49 once, with 60 days of follow-up questions and plan updates. Nothing renews, and you never have to buy a product.

Lower cost than most heat protectants

$1.17/oz at 6 oz, less than 96% of the 295 heat protectants , which mostly run $2.41–6.78/oz.

Price and stores

Great for

Protein-hungry hairthat stretches and stays stretched when wet

Dry, thirsty hairhumectants and emollients both sit up front

Fine hairthat flattens under most products

Very dry hairno fast-drying alcohol in the list

Tight budgetsit sits in the lower price tiers

Maybe skip if

this product has a scent

Curly-method routinesthese silicones need a detergent to remove

Protein-sensitive hairthat goes stiff or straw-like on protein

Dry or very humid airwhere heavy humectants work against you

Picking it up locallywe’ve only seen it sold in one channel

How much heat protection you need depends on how often and how hot you style. Your consultation takes that into account.

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 Light

Water-first and light: unlikely to flatten fine 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) High

Humectants near the top: binding water is one of its main jobs.

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. The 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
Glycerin	humectant	Pulls water into the hair	Moisturizes
Polysorbate 20	solubilizer	Keeps oils dissolved in water	Stabilizes
PEG-12 Dimethicone	emollient	Softens and smooths the strand	Buildup
Amodimethicone	silicone	Spreads heat across the strand	Buildup
Propylene Glycol	humectant	Pulls water into the hair	Moisturizes
Hydrolyzed Keratin	film former	Lays down the film that holds a shape	Protein
Phenoxyethanol	preservative	Keeps the product from spoiling	Stabilizes
FragrancePARFUM (FRAGRANCE)	fragrance	The scent	Fragrance
Citronellol	fragrance	The scent	Fragrance
Hexyl Cinnamal	fragrance	The scent	Fragrance
Limonene	fragrance	The scent	Fragrance

What the list leaves out, and what it carriesThe list carries no sulfates or drying alcohols. Protein sits high: this is a strengthening step rather than a moisture one. Fragrance is on the label. Water-insoluble silicones that need a detergent wash to remove.

Full ingredient list (23)

In the US, ingredients above 1% are listed from most to least. Below 1% they can appear in any order. Each note keeps three things apart: what the ingredient generally does, its role in this type of product, and what its position can tell you.

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 Glycerin

General function
Glycerin, also called glycerol, attracts moisture and mixes completely with water.

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

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
Water moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.

Scientific Reports
- humectant
3 Polysorbate 20

General function
Keeps fragrance and oils dissolved in a watery formula so it stays clear.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.
- solubilizer
- emulsifier
4 PEG-12 Dimethicone

General function
A water-soluble silicone that smooths without the build-up concern of standard silicones.

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

May suitBuild-up-sensitive routines
The PEG- and PPG-modified silicones disperse in water, so ordinary washing carries them off instead of leaving a film to accumulate.

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
Delivers the slip and surface smoothing of a silicone without needing a detergent wash to remove it afterwards.
- emollient
- silicone
- water-soluble silicone
5 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.

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 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
6 Propylene Glycol

General function
A small humectant and solvent that keeps formulas stable and helps active ingredients spread.

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

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it adds less weight than oils or butters do.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

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.

PubChem
- humectant
- solvent
7 Hydrolyzed Keratin

General function
Fragments of the same protein hair is made of. They fill gaps on damaged strands and make hair feel firmer for a few washes.

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
Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.

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
Size decides where it goes. In fibre testing, fractions around 221 and 2,577 Da reached the cortex while a 75,440 Da fraction stayed on the surface. A label prints the name, never the size, so a protein line is a claim about the ingredient rather than about the depth.

International Journal of Cosmetic Science
- film former
- protein
- hydrolysed protein
▾Below about here, the order stops meaning much. These are usually used at 1% or less.
8 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
9 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
10 Hydroxyacetophenone
- preservative
- antioxidant
11 Trideceth-12
- emulsifier
- solubilizer
12 Disodium EDTA

General function
Grabs metal ions from hard water so they cannot dull the hair or destabilise 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.

May suitBuild-up-sensitive routines
Binds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.

May suitGray, silver, or brass-prone hair
Copper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.

PubChem
- hard-water chelator
13 Citric Acid

General function
Used to bring the product to a slightly acidic pH, which helps the cuticle lie flat. It is almost always near the end of the list.

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 suitBuild-up-sensitive routines
Holds hard-water minerals in solution so they rinse away instead of depositing on the hair.

May suitFrizz-prone, damaged, or high-friction hair
The acid side of pH adjustment, and the reason it matters is measured: alkaline formulas raise the fibre's surface negative charge, increase friction between strands and lift the scales, while lower-pH ones do the reverse.

May suitGray, silver, or brass-prone hair
Where a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.

International Journal of Trichology
- pH adjuster
- hard-water chelator
14 Cetrimonium Chloride

General function
A quick-acting conditioning agent that reduces static and combing force. It also helps keep the formula stable.

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 suitFine or easily flattened hair
The C16 quat binds mostly by charge rather than by chain, so it deposits measurably less than the C22 ones. Less deposit is less conditioning and also less weight, which is usually the trade fine hair wants.

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.

DependsBuild-up-sensitive routines
Substantive by design. A routine with no detergent wash gives it nothing to leave with.

International Journal of Cosmetic Science
- conditioning agent
- cleanser
15 Sodium Benzoate
- preservative
16 Acetic Acid

General function
Vinegar acid, used in tiny amounts to bring the formula to an acidic pH so the cuticle lies flat.

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.

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.

PubChem
- pH adjuster
17 Benzyl Alcohol
- preservative
- solvent
18 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
19 Hexyl Cinnamal

General function
A jasmine-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
20 Limonene

General function
A citrus-smelling fragrance component that EU rules require to be named separately 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.

PubChem
- fragrance
- named fragrance allergen
21 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
22 Citrus Limon (Lemon) Peel Oil · CITRUS LIMON PEEL OIL

General function
A cold-pressed citrus oil used for a fresh scent; naturally high in limonene.

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
Essential oils are fragrance. Several carry constituents on the EU list of declared fragrance allergens, so a label with no fragrance line can still be a scented product.
- botanical extract
- essential oil
- fragrance
23 Tetramethyl Acetyloctahydronaphthalenes

General function
A synthetic musk or woody-amber note used as a fragrance base.

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

What the whole list adds up to

7 fragrances
4 preservatives
4 named fragrance allergens
3 solvents
2 humectants
2 solubilizers
2 emulsifiers
2 silicones
2 film formers
2 hard-water chelators
2 pH adjusters
1 emollient
1 water-soluble silicone
1 conditioning agent

Ingredient list captured 2026-10-07. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 6 oz

Seen at $6.99 1 store · checked Oct 17

Good value under $12 Under $1.96/oz it costs less than three-quarters of the 7 products we score as doing the same job

Usually a good value. Most stores sell it under the $12 line, and products that do this job typically go for about $13 at this size.

Show the price ladder

Price for 6 ozlower is better

Where we’ve seen it1 listing · 1 store

Target (target.com)
$6.99

6 oz · $1.17/oz

Oct 17Lowest 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

6 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 $6.99 is the price we have observed for the 6 oz. We need three stores before we call a price commonly seen.
Good value under $12 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $1.96/oz; at 6 oz that is $12. Under that line you are paying less than most of them.
About $13 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 6 oz.

Formula

Formula score

8 of 10

It carries the working systems a heat protectant needs and still sits in the lower part of the price range for heat protectants per ounce.

How the score is counted

Costs less per ounce than 96% of the 295 heat protectants we’ve priced
Covers 5 of the 6 things a heat protectant should do
Reviewers mention 2 things they like about how it performs
Drugstore tier, sold at Grocery / mass

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 measures completeness for the job: a weighted share of the systems this product type is usually built around that we find in this list. It does not rate how well the product works or its quality, and it never compares across product types.

Does the same job

Formulas that do the same things (cleanse, condition, coat or hold) for less per ounce. Scent, texture and where you buy them can still differ.

LUSETAClosest function Argan Oil Heat Protectant Spray $2.24/oz $1.07/oz more

Function: Oils and butters
Also: Masstige tier
8.5 oz bottle

Compare

PanteneClose function Miracle Rescue 10-in-1 Multitasking Spray + Keratin $2.27/oz $1.10/oz more

Heat protect
Protein
Alcohol-free

Function: Slip and detangling
Weight on the hair
Also: 5.7 oz bottle

Compare

TRESemmeLowest cost per oz Protecting Heat Spray Keratin Smooth for Taming Frizz & Reducing Breakage $1.04/oz $0.13/oz less

Heat protect
Protein
Lightweight

· Close function

Function: Film formers
UV filter
Also: 2 oz bottle

Compare

See more alternatives in the product library

These products do a similar job. We haven’t matched them to you. Find the one that fits your hair, routine and budget

Final decision

Should you buy it?

Good for the right person

Best user

Soft, over-stretchy hair, looking for protein high in the formula and moisture that stays in

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, curly-method routines, or hair that stiffens on protein

Best alternative if not

Nothing in our library matches it closely 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, and what the formula shows

Claims are quoted from the brand. We mark a claim supported, partly supported or conflicting only when the ingredient list speaks to it. Everything else stays "stated by the brand". That isn’t a criticism: most claims can’t be checked from a label.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

Protects hair from heat up to 450F/230C

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

PEG-12 Dimethicone
Amodimethicone
Hydrolyzed Keratin

Stated by brand

Only lab testing can show this.

Contains keratin to reduce frizz and seal split ends

Protein sits in the first eight ingredients.

Hydrolyzed Keratin
Cetrimonium Chloride

Supported

Reinforces a damaged strand.

Lightweight, non-sticky formula

Light silicones and low wax content help it avoid visible residue.

Water
PEG-12 Dimethicone
Amodimethicone

Supported

Less likely to weigh hair down.

How to read this

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

Reviewers

What people report

Themes that come up again and again in sourced reviews, written by our researchers in their own words. We don’t store or scrape star ratings.

Many reviewers say the spray feels light and leaves no sticky or greasy residue on their hair.

Mixed Ulta reviewers with fine, wavy, curly and colour-treated hair; several reviews were marked as received in exchange for an honest review.

Reviewers often say the spray leaves hair smoother, shinier and less frizzy after heat styling.

Reviewers who blow-dry, flat-iron or curl their hair several times a week, across the star range.

A smaller group reports a greasy, sticky or filmy finish after spraying, which they did not want.

A minority of reviewers, mostly rating 1 or 2 stars, describing the finish after spraying on washed hair.

A few reviewers doubt the protection at high heat, reporting hair that smoked or felt unprotected under a curling iron.

Reviewers using a curling iron or straightener at high settings; most other reviewers who named a tool were satisfied with everyday heat use.

Reviewers split sharply on the fragrance, calling it fresh and sweet while others find it heavy, musky or childlike.

Reviewers across the star range; the strongest negative scent comments came from 1- and 2-star reviews.

How this page was made

Everything above comes from our researched product record: identity, the ingredient list as printed, the brand's own claims, dated prices and review themes our researchers wrote in their own words. No part of this page is written by hand for one 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.
4 sources consulted for this product (0 manufacturer or regulatory, 3 retailer, 1 editorial), last checked 2026-10-31.
Ingredient references are linked for 12 of 16 product-aware annotations on this page. Fit notes are general formulation guidance. They aren’t a verdict on the finished product or on you.
We haven’t tested this product in a lab, and we don’t physically test your hair. Formula readings come from the ingredient list. Claims about how it behaves are labelled as the brand's.
Ingredient order tells you relative amount only above roughly 1%. Prices are what we saw on the dates shown and can change.
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 v23. Record last updated 2026-10-31.

SMOOTH Heat Protectant

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, and what the formula shows

What people report

More from MONDAY Haircare

How this page was made

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