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Side by side

Bondi Boost Lock Drops Anti-Shedding Scalp & Hair Serum vs Drybar Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser

99% function match · 7 of the 7 functions we compared match Formula overlap 23%. Bondi Boost Lock Drops Anti-Shedding Scalp & Hair Serum and Drybar Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser share 1 ingredient among each other's most prominent.

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.

  • Lock Drops Anti-Shedding Scalp & Hair Serum — fine hair

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
Bondi Boost Lock Drops Anti-Shedding Scalp & Hair Serum — 1 oz container Bondi Boost

Lock Drops Anti-Shedding Scalp & Hair Serum

  • Scalp treatment
  • Salon
  • Sulfate-free
  • Silicone-free
Drybar Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser — 6 oz container Drybar

Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser

  • Scalp treatment
  • Salon
Price, size & price per ounce
$30 1 oz · $30.00/oz
$32–38 6 oz · $6.33/oz

Compared at different sizes — 6 oz against 1 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Same job for less elsewhere $$$$$ Salon tier · costs more than 90% of the 154 scalp treatments we’ve priced
Priced with its peers $$$$$ Salon tier · costs less than 54% of the 154 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
Weight on hair
Light Water-first and light: unlikely to flatten fine hair. Your hair
—
Fragrance
Present Fragrance is listed; it sits below the working ingredients. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein
Minor Protein appears, low enough to be a supporting ingredient. 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
Moderate 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
  • Fine hairthat flattens under most products
  • Silicone-free routinesno silicones appear in the list
  • Very dry hairno fast-drying alcohol in the list
  • Vegan and cruelty-freeour researched record has it as both
—
Why you might skip it
  • Scents bother youthis product carries a light 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
  • Dry or very humid airwhere heavy humectants work against you
  • Tight budgetsit sits in the upper price tiers
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 treatmentserum
Scalp treatmentcream
Where to buy
Brand website
Brand website · Specialty beauty
Free of
  • sulfate-free
  • silicone-free
  • curly-method compatible
—
Vegan
Vegan · label states
—
Cruelty-free
Cruelty-free · label states
—
Scent
Scented, not described
Use stage
—
Before shampoo
Start on
—
wet hair
Label wait
—
no wait
Needs
—
not stated on the label
How often
as needed
—

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

IngredientLock Drops Anti-Shedding Scalp & Hair SerumCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser
Water
Neutral
#1Leading
#1Leading
Propanediol
Moisturizes
#3Leading
#2Leading
Glycerin
Moisturizes
#4Supporting
#4Supporting
Caprylyl Glycol
Moisturizes
#8Below the 1% line
#21Below the 1% line
Fragrance
Fragrance
#13Below the 1% line
#30Below the 1% line
Limonene
Fragrance
#40Below the 1% line
#32Below the 1% line

What only one of them carries

Lock Drops Anti-Shedding Scalp & Hair Serum

Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser

Full ingredient list — Lock Drops Anti-Shedding Scalp & Hair Serum (51)
Full ingredient list — Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser (33)

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.

VerdictsLock Drops Anti-Shedding Scalp & Hair SerumCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser
Supported
0
0
Partly supported
0
0
Stated by brand
4
5
Potential conflict
0
0

Lock Drops Anti-Shedding Scalp & Hair Serum

  • 100% would recommend for reducing sheddingStated by brandOnly the brand’s testing shows this.
  • 97% saw visible results in under 2 monthsStated by brandOnly the brand’s testing shows this.
  • 92% noticed new baby hairs within 2 monthsStated by brandOnly the brand’s testing shows this.
  • 92% noticed less hair in their brushStated by brandOnly the brand’s testing shows this.

Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser

  • Extended blowout longevity up to 4 days when used before Drybar shampoo/conditionerStated by brandCan’t be confirmed from label.
  • 100% of users reported improved scalp condition after one useStated by brandOnly the brand’s testing shows this.
  • Increases scalp circulation via exfoliating applicatorStated by brandCan’t be confirmed from label.
  • Soothes scalp and reduces visible flakes and drynessStated by brandSoothing, not an active treatment.
  • Reduces itchinessStated by brandCan’t be confirmed from label.

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.

Bondi Boost Lock Drops Anti-Shedding Scalp & Hair Serum draws complaints about dryness and the scent; Drybar Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser draws complaints about the price.

Lock Drops Anti-Shedding Scalp & Hair Serum

reviewers who liked it describe it as lightweight and fast-absorbing without leaving the scalp greasy

general reviewers

several reviewers with fine or thinning hair say weeks of daily use made their hair feel visibly thicker or fuller

reviewers with fine/thinning hair using it alongside the brand's shampoo/conditioner

a substantial share of reviewers report no visible reduction in shedding or new growth even after a month or two of consistent use

reviewers using it for shedding/thinning over 1-2 months

multiple reviewers describe the fragrance as too strong and report dryness, scalp irritation or allergic-type reactions

reviewers sensitive to fragrance or with sensitive scalps

Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser

Several reviewers report a noticeably less itchy, flake-free scalp and less buildup after using it before shampooing

general Ulta reviewers

Reviewers say the massaging applicator makes the product feel like a scalp treatment rather than a plain cleanser

general Ulta reviewers

Some reviewers feel it does not extend time between washes any better than an ordinary shampoo would

general Ulta reviewers

A recurring complaint is that the price feels high relative to the size and result

general Ulta reviewers

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.

$6.33/oz vs $30.00/oz — Bondi Boost Lock Drops Anti-Shedding Scalp & Hair Serum costs about 4.7× more per ounce than Drybar Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser.

$1.25/oz median $7.19/oz $55.03/oz $30.00/oz Lock Drops Anti-Shedding S $6.33/oz Crown Tonic Pre-Shampoo Sc

Every mark sits on one distribution because these are compared against the same set: 154 scalp treatments with a computable unit price.

Value readLock Drops Anti-Shedding Scalp & Hair SerumCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser
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.

Lock Drops Anti-Shedding Scalp & Hair Serum vs Hair Restore Advanced Growth Support SerumNeutrogena · 100% function matchCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser vs Scalp Care Scalp Cleansing SerumDesign Essentials · 99% function matchLock Drops Anti-Shedding Scalp & Hair Serum vs Turmeric Purifying Hair & Scalp MaskBounce Curl · 99% function matchCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser vs Turmeric Purifying Hair & Scalp MaskBounce Curl · 99% function matchLock Drops Anti-Shedding Scalp & Hair Serum vs Scalp Care Scalp Cleansing SerumDesign Essentials · 99% function matchCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser vs Clean Beauty Scalp Therapy DropsPaul Mitchell · 99% function matchLock Drops Anti-Shedding Scalp & Hair Serum vs Clean Beauty Scalp Therapy DropsPaul Mitchell · 99% function matchCrown Tonic Pre-Shampoo Scalp-Balancing Cleanser vs Hair Restore Advanced Growth Support SerumNeutrogena · 99% function match

Lock Drops Anti-Shedding Scalp & Hair Serum · Crown Tonic Pre-Shampoo Scalp-Balancing Cleanser · 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.
  • 5 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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