Skip to main content
Wella

Eimi Smooth Thermal Image

Heat protectant / Spray, lightweight

  • Heat protectant
  • spray
  • Sulfate-free
  • Protein-free
  • Moisture-rich
  • Not cruelty-free · PETA-listed
Size150 ml / 5.07 oz
Price$15–17commonly seen · 5.07 oz
Price / oz$3.20/ozat 5.07 oz
Where to buy5 stores · $13.25–22.50

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

Scent:

Reviewers describe it as fresh.

Manufacturer page: wella.com

Personal fit

Is this right for you?

Complete the consultation to see how well this product fits your hair and your goals. With 6,000+ products in our library, we can match you to the right ones.

  • About 20 minutes, and your answers save as you go.
  • Every product matched against your hair across the 21 factors we check.
  • A personalized routine built around your schedule, styling habits, and local weather.
  • Find products that do the same job at a lower cost.
  • Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.

$49 with 60 days of follow-up questions and plan updates

$99 with 12 months. Pay once; the year renews only if you choose.

Start your consultation

Priced with its peers

$3.20/oz at 5.07 oz, less than 66% of the 295 heat protectants , which mostly run $2.41–6.78/oz. The cost less.

Price and stores

Great for

Protein-sensitive hairthat stiffens when protein is added
Maximum slipfor hair that tangles the moment it is wet
Dry, thirsty hairhumectants and emollients both sit up front
Fine hairthat flattens under most products
Sun and colour fadea UV filter is in the list
Short ingredient listsfifteen ingredients or fewer

Maybe skip if

this product has a scent
Curly-method routinesthese silicones need a detergent to remove
Very dry or damaged hairit contains fast-drying alcohol
Dry or very humid airwhere heavy humectants work against you
Vegan and cruelty-freeour record does not support both claims here
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 High

Conditioning agents sit high in the list, so this is a detangling formula.

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 High in the list

Fast-drying alcohol in the first three ingredients.

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.

IngredientWhat it doesWhy it mattersChip
Alcohol Denat. drying alcohol Speeds drying but can leave hair feeling dry Drying
WaterWater/Eau solvent The base everything else is dissolved in Neutral
Isododecane solvent The base everything else is dissolved in Softens
Disiloxane silicone Spreads heat across the strand Buildup
Glycerin humectant Pulls water into the hair Moisturizes
VP/VA Copolymer film former Lays down the film that holds a shape Holds
Panthenol humectant Pulls water into the hair Detangles
Polyquaternium-16 conditioning agent Conditions and softens so hair combs through Detangles
Dimethicone silicone A little heat-spreading smoothing Buildup
FragranceFragrance/Parfum fragrance The scent Fragrance
Dimethiconol silicone A little heat-spreading smoothing Buildup
What the list leaves out, and what it carriesThe list carries no sulfates. No protein: a moisture formula, not a repair one. Fragrance is on the label. Water-insoluble silicones that need a detergent wash to remove.
Full ingredient list (15)

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 Alcohol Denat.
    General function

    Fast-drying alcohol used to make sprays set quickly. In leave-on products it can leave hair feeling dry, especially in high position on the list.

    Leading ingredient

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

    May suitFine or easily flattened hair

    Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.

    May not suitDry, coarse, or high-porosity hair

    Porous hair gives water up easily as it is; a fast-evaporating solvent high on the list accelerates that.

    May not suitVery dry or highly damaged hair

    It evaporates quickly and takes some water with it. On hair already short of moisture, a formula built on a lot of it can finish drier than it started.

    PubChem
    • drying alcohol
    • solvent
  • 2 Water · Water/Eau
    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
  • 3 Isododecane
    General function

    A fast-evaporating carrier that lets oils and polymers spread thinly, then leaves nothing behind.

    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.

    PubChem
    • solvent
    • emollient
  • 4 Disiloxane
    General function

    A very light, fast-evaporating silicone used for weightless slip.

    Supporting ingredient

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

    May suitBuild-up-sensitive routines

    It leaves the hair by evaporating rather than by being washed off, so it is not part of what accumulates.

    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 suitFine or easily flattened hair

    A cyclic silicone evaporates after it has spread the formula, so it carries the other ingredients without leaving weight behind.

    PubChem
    • silicone
    • emollient
  • 5 Glycerin
    General function

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

    Supporting ingredient

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

    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
  • 6 VP/VA Copolymer
    General function

    A hold polymer that dries to a clear film. It sets the style and washes out with water.

    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
  • 7 Panthenol
    General function

    Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

    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

    It hydrates without adding oil or a film, which is the combination fine hair usually needs.

    May suitFrizz-prone, damaged, or high-friction hair

    Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

    May suitVery dry or highly damaged hair

    A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

    PubChem
    • humectant
    • conditioning agent
    • vitamin
  • 8 Polyquaternium-16
    General function

    A hold polymer common in hairsprays and mousses; it sets without much stiffness.

    Supporting ingredient

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

    May suitCurls or waves needing flexible hold

    Cationic polymers hold a curl loosely and stay soft, which is why they turn up in definition products rather than firm-hold ones.

    May suitFrizz-prone, damaged, or high-friction hair

    A cationic polymer stays on the hair through rinsing, which is what keeps static and combing friction down after the wash.

    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.

    • conditioning agent
    • film former
    • polymer
  • 9 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.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the 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
  • ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
  • 10 Fragrance · Fragrance/Parfum
    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
  • 11 Lactic Acid
    General function

    An acid used to set pH and, in scalp products, to loosen flakes.

    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.

    PubChem
    • pH adjuster
    • humectant
    • exfoliant
  • 12 Ethylhexyl Methoxycinnamate
    General function

    A UV filter added to protect the product's colour and, in leave-ins, to slow colour fade.

    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 suitGray, silver, or brass-prone hair

    Sunlight oxidises hair pigment, and on gray, silver or lightened hair that shows up as yellowing. A UV filter on the label absorbs some of the light that drives it.

    PubChem
    • UV filter
  • 13 Dimethiconol
    General function

    A high-shine silicone often paired with dimethicone for a smoother, glossier finish.

    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

    Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.

    PubChem
    • silicone
    • emollient
  • 14 Sodium Hydroxide
    General function

    A strong base used in trace amounts to raise pH; fully neutralised in the finished product.

    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

    The alkali half of a pH-adjusting pair, used in small amounts to bring a formula up to its target rather than to make it alkaline. Alkaline conditions raise the fibre's surface charge and lift the scales — but the finished pH is not on the label.

    International Journal of Trichology
    • pH adjuster
  • 15 Violet 2
    • colourant
    • direct dye
    • violet dye

What the whole list adds up to

  • 4 emollients
  • 3 solvents
  • 3 silicones
  • 3 humectants
  • 2 film formers
  • 2 polymers
  • 2 conditioning agents
  • 2 pH adjusters
  • 1 drying alcohol
  • 1 vitamin
  • 1 conditioning agent
  • 1 fragrance
  • 1 declared fragrance
  • 1 exfoliant

Ingredient list captured 2026-10-17. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 5.07 oz

Commonly seen $15–17 Midpoint $16.25 · 4 stores · checked Oct 17
Good value under $5 Under $0.99/oz it costs less than three-quarters of the 4 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $5 line; products that do this job typically go for about $9 at this size.

Show the price ladder
Where we’ve seen it5 listings · 5 stores

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. and 1 listing we don’t count, from grey-market or unverified sellers.

How we work this out
  1. 5.07 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.
  2. Commonly seen is the middle half of current prices for the 5.07 oz at recognised stores. We leave out the cheapest and most expensive quarters, so one sale or one overpriced listing can’t move it.
  3. Good value under $5 comes from the 4 products we score as doing the same job as this one. A quarter of them cost less than $0.99/oz; at 5.07 oz that is $5. Under that line you are paying less than most of them.
  4. About $9 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 5.07 oz.

Formula

Formula score
8 of 10

A complete formula at an ordinary price: mid-range per ounce among heat protectants, with the working systems in place.

How the score is counted
  • Costs less per ounce than 66% 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
  • Masstige 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 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.

DrybarClosest function Agua Fresca Leave-In Conditioning Milk
  • Heat protect
  • Protein-free
  • Lightweight
Function
  • Slip and detangling
  • Fast-drying alcohol
  • UV filter
Also
  • Coconut scent, not fresh
  • Prestige tier
Compare
SuaveLowest cost per oz Essentials Heat Protection Shield Spray $0.42/oz $2.78/oz less
  • Heat protect
  • Protein-free
  • Lightweight
· Related function
Function
  • Film formers
  • Fast-drying alcohol
Also
  • Cruelty-free
  • Drugstore tier
  • 11 oz bottle
Compare
dpHUEClose function Apple Cider Vinegar Wonderworks Leave-In Conditioner
  • Heat protect
  • Protein-free
  • Lightweight
Function
  • Film formers
  • Fast-drying alcohol
  • UV filter
Also
  • Sweet scent, not fresh
  • Sold online
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

Built for straight to curly hair

Final decision

Should you buy it?

Good for the right person
Best user

Hair that stiffens on protein, looking for a protein-free formula and real detangling slip

Biggest tradeoff

Less suited to anyone sensitive to fragrance, curly-method routines, or very dry or high-damage hair

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.

1
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
1
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Heat protection up to 220°C

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

  • Disiloxane
  • VP/VA Copolymer
  • Polyquaternium-16
Stated by brand

Only lab testing can show this.

Two-phase spray that protects hair from heat while nourishing the hair

Humectants or rich emollients sit in the first eight ingredients.

  • Isododecane
  • Disiloxane
  • Glycerin
Supported

Helps hair feel hydrated.

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.

Reviewers like that it is lightweight and leaves no sticky or greasy film, so hair is not weighed down or quicker to look oily.

Reviewers comparing it with other heat sprays

Reviewers say it provides reliable heat protection for blow drying and straightening and leaves hair smooth, soft and shiny with less dryness.

German-language reviewers who use heat tools

Reviewers like the pleasant fresh scent, though a couple say the bottle must be shaken long and hard to mix before use.

Reviewers commenting on scent and usability

More from Wella

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 (2 manufacturer or regulatory, 1 retailer, 1 editorial), last checked 2026-10-17.
  • Ingredient references are linked for 9 of 13 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 2026-10-17.

Hair Care Consultation

A care plan made for your hair and goals, then follow-up questions and plan updates.

  • Answers to your hair concerns
  • Formula-based product picks
  • Routines for your lifestyle and preferences
  • Updates for weather, needs and goals

$49with 60 days of follow-ups

Start my consultation