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IGK

Good Behavior Supreme Seal Anti-Frizz Serum

Finisher / Anti-frizz finisher, glossing

  • Finisher
  • anti frizz finish
  • serum
  • Sulfate-free
  • Protein-free
Size1.7 fl oz
Price$23–34commonly seen · 1.7 oz
Price / oz$16.80/ozat 1.7 oz

Scent:

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

Listing used for research: ulta.com

Personal fit

Is this right for you?

Complete the consultation to see exactly how well this product fits your hair and your goals. With 2,400+ products in our library we can match exactly the right products to you.

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Same job for less elsewhere

$16.80/oz at 1.7 oz — more than 95% of the 22 anti-frizz finishers , which mostly run $2.66–7.72/oz.

View alternatives

Great for

Protein-sensitive hairthat stiffens when protein is added
Coarse or dry hairthat absorbs everything you give it
Dull-looking haira recognised shine system is present
Humid climatesthe brand claims humidity resistance
Very dry hairno fast-drying alcohol in the list
Aerosol avoidancea pump or tube, not a pressurised can

Maybe skip if

this product carries a scent
Curly-method routinesthese silicones need a detergent to remove
Oily scalp or fine hairthat gets weighed down
Tight budgetsit sits in the upper price tiers

Whether a finisher this rich will read as shine or as grease depends on your strand thickness and oil rate — 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.

Shine system Silicone serum

A silicone or oil blend does the shine work here.

Weight on the hair Rich

Heavy butters and waxes in the first eight ingredients.

Oils and butters Present, lower down

Oils are present, but low enough to be a finishing touch.

Humidity resistance Claimed

The brand claims humidity resistance; the ingredient list cannot confirm it.

Needs detergent to remove Yes

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

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.

IngredientWhat it doesWhy it mattersChip
Dimethicone silicone The shine system Buildup
C15-19 Alkane emollient Softens and smooths the strand Shine
C13-15 Alkane emollient Softens and smooths the strand Shine
Isododecane solvent The base everything else is dissolved in Shine
C9-12 Alkane emollient Softens and smooths the strand Shine
Lauryl Laurate light ester Light slip without much weight Shine
Phenyl Trimethicone silicone The shine system Buildup
Spirulina Platensis Extract botanical extract A plant extract, marketed as much as functional Neutral
Brassica Campestris/Aleurites Fordi Oil Copolymer wax Adds a little grip Buildup
FragranceFragrance (Parfum) fragrance The scent Fragrance
Limonene fragrance The scent Fragrance
Coumarin fragrance The scent Fragrance
What the list leaves out, and what it carriesThe list carries no sulfates or drying alcohols. No protein — a moisture formula, not a repair one. Fragrance is on the label. Heavier butters sit in the working part of the list.
Full ingredient list (24)

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 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
  • 2 C15-19 Alkane
    General function

    A plant-derived light alkane used as a clean-feeling silicone alternative.

    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 C13-15 Alkane
    General function

    A plant-derived light alkane used as a clean-feeling replacement for silicone or mineral oil.

    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
  • 4 Isododecane
    General function

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

    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.

    PubChem
    • solvent
    • emollient
  • 5 C9-12 Alkane
    General function

    A very light plant-derived carrier that evaporates quickly.

    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
  • 6 Lauryl Laurate
    General function

    A fatty ester. Esters give slip and a smooth after-feel; lighter ones read dry and silky, heavier ones read rich.

    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

    A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

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

    Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

    PubChem
    • light ester
    • emollient
  • 7 Phenyl Trimethicone
    General function

    A high-refractive silicone used specifically for visible shine in serums and finishing oils.

    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

    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
  • 8 Spirulina Platensis Extract
    General function

    A blue-green algae extract used at low levels for protein and mineral claims.

    Supporting ingredient

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

    • botanical extract
  • 9 Cocos Nucifera (Coconut) Oil
    General function

    One of the few oils small enough to move into the strand, which is why it is used for pre-wash treatments. It can feel heavy or stiff on protein-sensitive hair.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    May suitDry, coarse, or high-porosity hair

    Because it penetrates rather than sits on top, it works on hair that loses water through a worn cuticle instead of only slowing evaporation from the surface the way a non-penetrating oil does.

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

    A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

    May suitVery dry or highly damaged hair

    The exception to the class read: lauric acid is small and linear enough to enter the shaft rather than only coat it, and in comparison testing coconut oil was the one that reduced protein loss from washing on both undamaged and damaged hair.

    International Journal of Trichology
    • oil
    • emollient
  • 10 Prunus Avium (Sweet Cherry) Seed Oil
    • oil
    • emollient
  • 11 Salvia Hispanica Seed Oil
    General function

    The oil pressed from Salvia Hispanica. How much weight a plant oil leaves depends on the hair it lands on; coarse hair tends to take more of it than fine hair.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    May suitDry, coarse, or high-porosity hair

    Coats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.

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

    A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

    • oil
    • emollient
  • Below about this point, order stops being meaningful — these are typically used at 1% or less.
  • 12 Oryza Sativa (Rice) Bran Extract
    • botanical extract
    • antioxidant
  • 13 Helianthus Annuus (Sunflower) Extract
    • botanical extract
  • 14 Coco-Caprylate/Caprate
    General function

    A plant-derived light ester used where a silicone-free but silky feel is wanted.

    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

    A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

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

    Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

    • light ester
    • emollient
  • 15 Caprylyl Glycol
    General function

    A gentle preservative helper that also holds a little moisture.

    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

    Humectants bind water into the strand, and water — not oil — is what makes dry hair flexible instead of brittle.

    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
    • preservative
    • humectant
  • 16 Tocopherol
    • antioxidant
    • vitamin
  • 17 Rosmarinus Officinalis (Rosemary) Leaf Extract
    • botanical extract
    • antioxidant
  • 18 Brassica Campestris/Aleurites Fordi Oil Copolymer
    General function

    A plant-oil wax used as a vegan alternative to beeswax for hold and sheen.

    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

    Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

    May suitMaximum-hold styling

    A wax holds by staying solid on the strand, which gives grip and separation rather than a set film that cracks.

    DependsCurls or waves needing flexible hold

    How rigid the finish is depends on which polymer it is and what the formula pairs with it, not on there being one.

    • wax
    • film former
    • emollient
  • 19 Caprylic/Capric Triglyceride
    General function

    A light, refined coconut-derived oil that spreads easily and does not go rancid. It gives slip without a heavy feel.

    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

    A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

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

    Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

    • light ester
    • emollient
  • 20 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
  • 21 Phenoxyethanol
    • preservative
  • 22 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
  • 23 Coumarin
    General function

    A sweet, hay-like 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
  • 24 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

What the whole list adds up to

  • 13 emollients
  • 4 solvents
  • 4 botanical extracts
  • 4 fragrances
  • 3 light esters
  • 3 oils
  • 3 antioxidants
  • 3 named fragrance allergens
  • 2 silicones
  • 2 preservatives
  • 1 conditioning agent
  • 1 humectant
  • 1 vitamin
  • 1 wax

Ingredient list captured 2026-08-27. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 1.7 oz

Commonly seen $23–34 Midpoint $28.56 · 4 stores · checked Aug 30
Good value under $11 Under $6.59/oz it costs less than three-quarters of the 7 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $11 line; products that do this job typically go for about $21 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.

How we work this out
  1. 1.7 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 1.7 oz at recognised stores — the cheapest quarter and the dearest quarter are left out, so one sale or one overpriced listing can’t move it.
  3. Good value under $11 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $6.59/oz; at 1.7 oz that is $11. Under that line you are paying less than most of them.
  4. About $21 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 1.7 oz.

Formula

Formula score
8 of 10

This is a complete anti-frizz finisher formula. It is also above the range for anti-frizz finishers per ounce, with 3 close matches selling for meaningfully less.

How the score is counted
  • 3 products that do the same job cost less per ounce
  • Costs more per ounce than 95% of the 22 anti-frizz finishers we’ve priced
  • Covers 5 of the 6 things a anti-frizz finisher should do
  • Reviewers mention 2 things they like about how it performs
  • A shine systemThe silicone, oil, or ester that produces gloss.3 pts
  • A weightless carrierDelivers the shine without leaving grease.2 pts
  • Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
  • An antioxidantKeeps the oils in the bottle from going off.1 pt
  • No drying alcohol in the first threeFast drying without leading on alcohol.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.

KitschClosest function Frizz Control Shine Hair Serum $7.50/oz $9.30/oz less
  • Protein-free
  • Rich
  • Shine
Function
  • Water-binding (humectants)
  • Oils and butters
Also
  • Masstige tier
  • 2 oz bottle
Compare
Paul MitchellClose function Awapuhi Wild Ginger Styling Treatment Oil $12.35/oz $4.45/oz less
  • Protein-free
  • Rich
  • Shine
Function
  • Water-binding (humectants)
  • Oils and butters
Also
  • Cruelty-free
  • Drugstore tier
  • 0.8 oz bottle
Compare
OuaiLowest cost per oz Hair Gloss $5.67/oz $11.13/oz less
  • Protein-free
  • Shine
  • Alcohol-free
· Close function
Function
  • Water-binding (humectants)
  • Oils and butters
  • Weight on the hair
Also
  • Cruelty-free
  • 6 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

Built for curly to coily hair

Final decision

Should you buy it?

Good for the right person, not the lowest cost
Best user

Hair that stiffens on protein, looking for a protein-free formula and a formula with real substance

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, curly-method routines, or oily scalps and fine hair

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.

Reviewers

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.

Best-in-class frizz control that holds up in hot, humid weather without feeling greasy

Salon-smooth finish and shine without heaviness, layers well with other products

Some flyaways remained after straightening, felt thin/greasy to this reviewer

Helps tame frizz on curly hair but not a standout versus other anti-frizz products tried

curly hair

More from IGK

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.
  • 1 source consulted for this product (1 manufacturer or regulatory, 0 retailer, 0 editorial), last checked 2026-08-27.
  • Ingredient references are linked for 7 of 17 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 2026-08-28.