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Redken

Acidic Bonding Concentrate Intensive Treatment

Mask / Weekly treatment, lean

  • Mask / treatment
  • cream
  • Sulfate-free
  • Silicone-free
  • Protein-free
  • Not cruelty-free · PETA-listed
Size6.42 fl oz (190 ml)usual store size · 3 sizes
Price$34.51seen at one store · 6.42 oz
Price / oz$5.49/ozat 6.42 oz
Where to buy5 stores · 3 sizes

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: redken.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.
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  • 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.

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Upper-mid price for a treatment

$5.49/oz at 6.42 oz, more than 73% of the 576 masks and treatments , which mostly run $1.80–5.62/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
Curly-method routinesno sulfates and no water-insoluble silicones
Silicone-free routinesno silicones appear in the list
Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers

Maybe skip if

this product has a scent
Very dry or damaged hairit contains fast-drying alcohol
Hair that needs proteinthere is none in this list
Dry or very humid airwhere heavy humectants work against you
Vegan and cruelty-freeour record does not support both claims here

Whether your hair needs moisture, protein or bond repair right now depends on its damage history and how it behaves wet. The consultation finds out which.

Wash day

How it fits into wash day

Read from the product’s own directions on the date shown. A step the label leaves out is shown as not stated, never filled in.

When
Before shampoo: Bond-care treatment (manufacturer claim)
Start on
wet hair
Where
lengths
Label wait
5–10 minutes
Then
rinse, then shampoo
Conditioner after
the label recommends conditioning after
How often
not stated on the label
  1. Apply to wet hair, lather.
  2. Leave-in for 5-10 minutes.
  3. Rinse.
  4. Follow with shampoo and conditioner.

Browse technique guides (general advice, not matched to this product’s directions)

Source: brand page · checked 2026-09-17

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.

Oils and butters None

No oils or butters in the list.

Weight on the hair Medium

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

Protein None

No protein or amino acids in the list.

Water-binding (humectants) High

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

Slip and detangling High

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

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

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
WaterAqua/Water/Eau solvent The base everything else is dissolved in Neutral
Cetearyl Alcohol fatty alcohol Thickens and conditions (not a drying alcohol) Softens
Glycerin humectant Pulls water into the hair Moisturizes
Behentrimonium Chloride conditioning agent Conditions and softens so hair combs through Detangles
Stearyl Alcohol fatty alcohol Thickens and conditions (not a drying alcohol) Softens
Citric Acid pH adjuster Fine-tunes the pH pH balancer
Cetyl Esters light ester A light, silky feel Softens
Sodium Citrate pH adjuster Fine-tunes the pH pH balancer
Isopropyl Alcohol drying alcohol A small amount, for fast drying Drying
FragranceParfum/Fragrance fragrance The scent Fragrance
Limonene fragrance The scent Fragrance
Linalool fragrance The scent Fragrance
What the list leaves out, and what it carriesNo sulfates or silicones. Protein-free: this is built for moisture rather than for strengthening. Contains fragrance. Fast-drying alcohol is in the list.
Full ingredient list (16)

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/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
  • 2 Cetearyl Alcohol
    General function

    A waxy fatty alcohol - nothing like drying alcohol. It gives conditioners their body and leaves a soft, smoothing film on the hair.

    Leading ingredient

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

    May suitDry, coarse, or high-porosity hair

    The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

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

    Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

    DependsFine or easily flattened hair

    Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

    PubChem
    • fatty alcohol
    • emollient
    • thickener
  • 3 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
  • 4 Behentrimonium Chloride
    General function

    A positively charged conditioning agent that binds to damaged, negatively charged spots on the hair. It is the main detangling ingredient in most rinse-out conditioners.

    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

    Electrokinetic measurement puts the C22 quat ahead of the C16 ones for deposition: the longer chain adds van der Waals stabilisation on top of the charge binding. That extra deposit is what coarse hair usually needs to comb through.

    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
  • 5 Stearyl Alcohol
    General function

    A fatty alcohol that thickens conditioners and helps them coat the hair evenly.

    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

    The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

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

    Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

    DependsFine or easily flattened hair

    Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

    PubChem
    • fatty alcohol
    • emollient
    • thickener
  • ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
  • 6 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
  • 7 Cetyl Esters
    General function

    A waxy ester blend that replaces spermaceti in creams. It thickens and leaves a smooth, non-greasy 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 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
    • thickener
  • 8 Sodium Citrate
    General function

    Used with citric acid to hold the formula at a steady, slightly acidic pH. It also binds a little hard-water mineral.

    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.

    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
    • hard-water chelator
  • 9 Isopropyl Alcohol
    General function

    A fast-evaporating alcohol used as a solvent and to speed drying. Well down the list it is a processing aid; near the top it can leave hair feeling dry.

    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

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

    PubChem
    • drying alcohol
    • solvent
  • 10 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
  • 11 Phenoxyethanol
    • preservative
  • 12 Polyquaternium-10
    General function

    A cellulose-based conditioning polymer that leaves a thin, static-reducing film. Very common in shampoos as the ingredient that keeps them from stripping.

    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 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
  • 13 Polysorbate 20
    • solubilizer
    • emulsifier
  • 14 Hydroxypropyl Guar
    General function

    A modified guar gum used to thicken and give a slippery, cushioned 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 suitCurls or waves needing flexible hold

    Gums thicken and set soft, which gives definition that bends rather than a rigid cast.

    May suitMaximum-hold styling

    A styling polymer dries into a film across the strands, which is what makes a shape hold instead of relax.

    • gum
    • thickener
    • polymer
  • 15 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
  • 16 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

  • 4 thickeners
  • 3 emollients
  • 3 fragrances
  • 2 solvents
  • 2 fatty alcohols
  • 2 conditioning agents
  • 2 pH adjusters
  • 2 hard-water chelators
  • 2 polymers
  • 2 named fragrance allergens
  • 1 humectant
  • 1 cleanser
  • 1 light ester
  • 1 drying alcohol

Ingredient list captured 2026-09-17. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 6.42 oz

Seen at $34.51 lowest of 2 stores · checked Sep 17
Good value under $12 Under $1.89/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 $12 line; products that do this job typically go for about $16 at this size.

Sizes

1 oz
$11.20
$13.60/oz
5.07 oz
$41.54
$8.19/oz
6.42 ozusual store size
$34.51
$5.49/oz

The 6.42 oz costs 60% less per ounce than the 1 oz.

Show the price ladder
Where we’ve seen it6 listings · 5 stores

6.42 ozusual store sizeBest per ounce

  • Care to Beauty
    $34.51
    6.42 oz · $5.38/oz
    Sep 17Lowest per ozSale · was $37.11
  • Harrods
    $36.00
    6.42 oz · $5.61/oz
    Sep 17

1 oz

5.07 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
  1. 6.42 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. Seen at $34.51 is the price we have observed for the 6.42 oz. We need three stores before we call a price commonly seen.
  3. Good value under $12 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $1.89/oz; at 6.42 oz that is $12. Under that line you are paying less than most of them.
  4. Each size is guarded on its own, so a multipack or a marketplace listing at one size cannot move another.
  5. About $16 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 6.42 oz.

Formula

Formula score
4 of 10

It costs about what other masks and treatments cost per ounce, but the formula leaves out rich emollients, which most of the format carries.

How the score is counted
  • 7 products we score as doing the same job cost less per ounce
  • Costs more per ounce than 73% of the 576 masks and treatments we’ve priced
  • No rich emollients in the formula
  • No protein or amino acids either
  • Rich emollientsThe depth a treatment step is built around.3 pts
  • Conditioning agents up frontWhat makes wet hair comb through.2 pts
  • Protein or amino acidsThe strengthening side of a treatment.2 pts
  • A humectantBinds water into the hair.1 pt
  • A stated dwell timeThe brand says how long to leave it on.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, for less

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.

L'Oreal ParisSame function EverPure Sulfate-Free Bond Repair+ Pre-Shampoo Treatment $2.55/oz $2.94/oz less
  • Protein-free
  • Curly method
  • Silicone-free
Differs
  • Drugstore tier
  • 5.1 oz bottle
Wash day
this one is not a before-shampoo product
Compare
CHISame function Naturals With Aloe Vera Intensive Hydrating Hair Masque $2.52/oz $2.97/oz less
  • Protein-free
  • Curly method
  • Silicone-free
Differs
  • Salon tier
  • 6 oz bottle
Wash day
this one is not a before-shampoo product
Compare
Design EssentialsLowest cost per oz Almond & Avocado Wash Day Deep Moisture Masque $1.27/oz $4.22/oz less
  • Protein-free
  • Curly method
  • Silicone-free
· Same function
Differs
  • Sweet scent
  • Cruelty-free
  • 12 oz bottle
Wash day
this one is not a before-shampoo product
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

Suits every hair pattern

Final decision

Should you buy it?

A solid pick for the hair it suits
Best user

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

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, very dry or high-damage hair, or soft, over-stretchy hair that needs protein

Best alternative if not

L'Oreal Paris EverPure Sulfate-Free Bond Repair+ Pre-Shampoo Treatment 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, 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.

0
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
4
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Combats 1 year of visible damage in 1 use

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

—

Stated by brand

Can’t be confirmed from label.

2x less breakage with continued use

A brand-run study. We report it as stated and do not repeat the number as fact.

—

Stated by brand

Only the brand’s testing shows this.

10x smoother hair with continued use

A brand-run study. We report it as stated and do not repeat the number as fact.

—

Stated by brand

Only the brand’s testing shows this.

Up to 88% Visual Reduction in Split Ends

A brand-run study. We report it as stated and do not repeat the number as fact.

—

Stated by brand

Only the brand’s testing shows this.

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 treatment leaves hair softer, smoother and less prone to breakage after use.

Reviewers with color-treated or damaged hair

Some reviewers say the treatment left their hair drier, brittle or stiff rather than moisturized.

Reviewers across hair types, including some with heat-damaged hair

Several reviewers saw little or no visible change, with some saying it did nothing for their hair.

Reviewers across hair types, often after several uses

Reviewers split on weight, with some feeling film or buildup while others say it rinses out light.

Reviewers across hair types

More from Redken

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.
  • 8 sources consulted for this product (2 manufacturer or regulatory, 2 retailer, 4 editorial), last checked 2026-10-31.
  • 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 2026-09-17.

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