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Side by side

Act+Acre Clarifying Hard Water Scalp + Hair Treatment vs Biolage Scalp Sync Purifying & Exfoliating Concentrate

92% function match · 6 of the 7 functions we compared match Formula overlap 0%. Act+Acre Clarifying Hard Water Scalp + Hair Treatment and Biolage Scalp Sync Purifying & Exfoliating Concentrate share no ingredient among each other's most prominent — which does not stop them doing the same job.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • Clarifying Hard Water Scalp + Hair Treatment — matte, textured styles
  • Scalp Sync Purifying & Exfoliating Concentrate — vegan and cruelty-free

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
Act+Acre Clarifying Hard Water Scalp + Hair Treatment — brand photograph Act+Acre

Clarifying Hard Water Scalp + Hair Treatment

  • Scalp treatment
  • Salon
Biolage Scalp Sync Purifying & Exfoliating Concentrate — container, alternate view Biolage

Scalp Sync Purifying & Exfoliating Concentrate

  • Scalp treatment
  • Salon
Price, size & price per ounce
about $38 1.41 oz · $26.95/oz
$26–29 6.8 oz · $4.13/oz

Compared at different sizes — 6.8 oz against 1.41 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Same job for less elsewhere $$$$$ Salon tier · costs more than 86% of the 152 scalp treatments we’ve priced
Priced with its peers $$$$$ Salon tier · costs less than 68% of the 152 scalp treatments we’ve priced
Best for hair types
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Same
High Humectants near the top — water-binding is a headline mechanism here. Your hair
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Slip / detangling Same
Little Nothing here is built to reduce combing force. Your hair
Little Nothing here is built to reduce combing force. Your hair
Fragrance
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Silicone / wax buildup Same
None Nothing here needs a detergent wash to remove. Your hair
None Nothing here needs a detergent wash to remove. Your hair
Clarifying wash needed
Low Your hair
Low Your hair
Oils and butters Same
None No oils or butters in the list. Your hair
None No oils or butters in the list. Your hair
Hard-water defence Same
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Formula completeness
out of 10
A simple formula
out of 10
A simple formula
Who should choose this
  • Matte, textured stylesabsorbent powders do the mattifying
  • Short ingredient listsfifteen ingredients or fewer
  • Vegan and cruelty-freeour researched record has it as both
Why you might skip it
  • Scents bother youthis product carries a scent
  • Dry or very humid airwhere heavy humectants work against you
  • Tight budgetsit sits in the upper price tiers
  • Scents bother youthis product carries a scent
  • Very dry or damaged hairit contains fast-drying alcohol
  • Dry or very humid airwhere heavy humectants work against you
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Scalp treatmentpowder
Scalp treatment
Where to buy
Brand website
Salons · Grocery / mass
Vegan
—
Vegan · label states
Cruelty-free
—
Cruelty-free · label states
Scent
Scented, not described
Scented, not described
How often
weekly
weekly

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

Take the consultation

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

The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientClarifying Hard Water Scalp + Hair TreatmentScalp Sync Purifying & Exfoliating Concentrate
Ascorbic Acid
Stabilizes
#3Leading
#21Below the 1% line
Fragrance
Fragrance
#8Below the 1% line
#11Below the 1% line

What only one of them carries

Clarifying Hard Water Scalp + Hair Treatment

Scalp Sync Purifying & Exfoliating Concentrate

Full ingredient list — Clarifying Hard Water Scalp + Hair Treatment (10)
Full ingredient list — Scalp Sync Purifying & Exfoliating Concentrate (21)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsClarifying Hard Water Scalp + Hair TreatmentScalp Sync Purifying & Exfoliating Concentrate
Supported
1
1
Partly supported
0
0
Stated by brand
2
3
Potential conflict
0
0

Clarifying Hard Water Scalp + Hair Treatment

  • Removes build-up to restore shineStated by brandCan’t be confirmed from label.
  • Hydrates scalp to improve elasticity + prevent breakageSupportedHelps hair feel hydrated.
  • Balances microbiome to reduce irritationStated by brandCan’t be confirmed from label.

Scalp Sync Purifying & Exfoliating Concentrate

  • Exfoliates and clarifies scalp after one useStated by brandCan’t be confirmed from label.
  • Removes buildup, excess oil, impurities, and dead skinStated by brandCan’t be confirmed from label.
  • Suitable for sensitive scalps and color-treated hairStated by brandCan’t be confirmed from label.
  • Soothes and hydrates scalp for up to 72 hoursSupportedHelps hair feel hydrated.

What owners say

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings, and we never balance one product’s themes against another’s by inventing them.

Both praised for moisture and a clean rinse-out. Act+Acre Clarifying Hard Water Scalp + Hair Treatment draws complaints about the scent; Biolage Scalp Sync Purifying & Exfoliating Concentrate draws complaints about irritation.

Clarifying Hard Water Scalp + Hair Treatment

reviewers with locs or textured hair report finally clearing years of hard-water buildup that other clarifying methods could not remove

loc and curly/coily hair wearers

customers in hard-water regions describe a dramatic reduction in buildup, dullness and brassiness after regular weekly use

hard-water and well-water users across several regions

several reviewers say the treatment leaves hair noticeably softer, shinier and with more volume without over-drying it

reviewers with fine and thick hair types

a recurring complaint is a strong, sometimes metallic or sulfurous smell that lingers on the hair for a day or more after rinsing

reviewers who otherwise liked the results

Scalp Sync Purifying & Exfoliating Concentrate

several reviewers with dry, itchy or eczema-affected scalps report significant relief after weeks of consistent use

reviewers with chronic dry/itchy scalp conditions

many reviewers with oily or buildup-prone scalps say it visibly reduces oil and extends time between washes when used weekly

reviewers with oily scalp, often paired with the matching shampoo/conditioner

reviewers repeatedly describe the texture as very thin and watery, making it hard to control and easy to overuse or spill

general reviewers

a recurring caution among reviewers is the product's sun-sensitivity warning, which several found off-putting or worrying for summer use

reviewers noting the AHA sun-sensitivity label

several reviewers who did not see results for dandruff or oiliness still praised the scent and the ritual feel of the pre-wash step

reviewers unconvinced of efficacy but positive on sensory experience

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

$4.13/oz vs $26.95/oz — Act+Acre Clarifying Hard Water Scalp + Hair Treatment costs about 6.5× more per ounce than Biolage Scalp Sync Purifying & Exfoliating Concentrate.

$1.25/oz median $7.12/oz $55.03/oz $26.95/oz Clarifying Hard Water Scal $4.13/oz Scalp Sync Purifying & Exf

Every mark sits on one distribution because these are compared against the same set: 152 scalp treatments with a computable unit price.

Value readClarifying Hard Water Scalp + Hair TreatmentScalp Sync Purifying & Exfoliating Concentrate
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Priced with its peersSits in the middle of the range for scalp treatments per ounce.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

Clarifying Hard Water Scalp + Hair Treatment vs Daily Hydro Scalp Serum with Hyaluronic AcidAct+Acre · 92% function matchScalp Sync Purifying & Exfoliating Concentrate vs Scalp SerumDivi · 99% function matchClarifying Hard Water Scalp + Hair Treatment vs 4% Niacinamide Scalp Serum for Oily Scalp + HairAct+Acre · 92% function matchScalp Sync Purifying & Exfoliating Concentrate vs Daily Hydro Scalp Serum with Hyaluronic AcidAct+Acre · 99% function matchClarifying Hard Water Scalp + Hair Treatment vs Salicylic Acid Scalp ExfoliatorAct+Acre · 92% function matchScalp Sync Purifying & Exfoliating Concentrate vs The Treatment Scalp SerumKilgourMD · 99% function matchClarifying Hard Water Scalp + Hair Treatment vs Stem Cell Scalp SerumAct+Acre · 92% function matchScalp Sync Purifying & Exfoliating Concentrate vs Restoring Hair & Edge Drops XLCÉCRED · 99% function match

Clarifying Hard Water Scalp + Hair Treatment · Scalp Sync Purifying & Exfoliating Concentrate · All scalp treatments in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • 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.
  • 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 were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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