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Side by side

Living Proof Perfect hair Day Shampoo vs Olaplex Nº.4C Bond Maintenance Clarifying Shampoo

96% function match · 12 of the 13 functions we compared match Formula overlap 52%. Living Proof Perfect hair Day Shampoo and Olaplex Nº.4C Bond Maintenance Clarifying Shampoo share 4 ingredients 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.

  • Perfect hair Day Shampoo — colour-treated hair
  • Nº.4C Bond Maintenance Clarifying Shampoo — colour-treated 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
Living Proof Perfect hair Day Shampoo — 2 oz container Living Proof

Perfect hair Day Shampoo

  • Shampoo
  • Prestige
  • Sulfate-free
  • Silicone-free
Olaplex Nº.4C Bond Maintenance Clarifying Shampoo — 8.5 oz container Olaplex

Nº.4C Bond Maintenance Clarifying Shampoo

  • Shampoo
  • Salon
  • Sulfate-free
  • Silicone-free
Price, size & price per ounce
about $17 2 oz · $8.50/oz
$29–34 8.5 oz · $3.70/oz

Compared at different sizes — 8.5 oz against 2 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Same job for less elsewhere $$$$$ Prestige tier · costs more than 99% of the 817 shampoos we’ve priced
Same job for less elsewhere $$$$$ Salon tier · costs more than 83% of the 817 shampoos 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 Differs
Moderate Humectants in the working part of the formula. Your hair
Low Humectants appear, but low enough to be a minor part. Your hair
Cleansing strength Same
Strong Removes oil, buildup, and most residue — a reset wash. Your hair
Strong Removes oil, buildup, and most residue — a reset wash. Your hair
Slip / detangling Same
Moderate Conditioning agents are present, lower in the list. Your hair
Moderate Conditioning agents are present, lower in the list. Your hair
Weight on hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your 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 Same
None No protein or amino acids in the list. Your hair
None No protein or amino acids in the list. 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
Expected lather Same
Moderate An ordinary shampoo lather. Your hair
Moderate An ordinary shampoo lather. Your hair
Scalp active Same
None No over-the-counter scalp active. Your hair
None No over-the-counter scalp active. 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
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-sensitive hairthat stiffens when protein is added
  • Fast-oiling scalpsthat need a real reset wash
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-sensitive hairthat stiffens when protein is added
  • Fast-oiling scalpsthat need a real reset wash
  • Curly-method routinesno sulfates and no water-insoluble silicones
Why you might skip it
  • Scents bother youthis product carries a scent
  • Dry or damaged haira strong detergent system strips as it cleans
  • Hair that needs proteinthere is none in this list
  • Scents bother youthis product carries a scent
  • Dry or damaged haira strong detergent system strips as it cleans
  • Hair that needs proteinthere is none in this list
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
Shampoo
Shampoocream
Line
Perfect hair Day
—
Where to buy
Brand website
Brand website · Specialty beauty · Grocery / mass
Free of
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
Vegan
Vegan · label states
Vegan · label states
Cruelty-free
Cruelty-free · PETA-listed
—
Scent
Fresh & airy
Scented, not described
How often
—
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

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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

IngredientPerfect hair Day ShampooNº.4C Bond Maintenance Clarifying Shampoo
Water
Neutral
#1Leading
#1Leading
Sodium Lauroyl Methyl Isethionate
Cleanses
#2Leading
#2Leading
Cocamidopropyl Hydroxysultaine
Cleanses
#3Leading
#3Leading
Decyl Glucoside
Cleanses
#6Supporting
#11Secondary
Fragrance
Fragrance
#22Below the 1% line
#40Below the 1% line
Limonene
Fragrance
#26Below the 1% line
#43Below the 1% line
Hexyl Cinnamal
Fragrance
#27Below the 1% line
#42Below the 1% line
Sodium Benzoate
Stabilizes
#24Below the 1% line
#21Below the 1% line

What only one of them carries

Perfect hair Day Shampoo

Nº.4C Bond Maintenance Clarifying Shampoo

Full ingredient list — Perfect hair Day Shampoo (29)
Full ingredient list — Nº.4C Bond Maintenance Clarifying Shampoo (43)

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.

VerdictsPerfect hair Day ShampooNº.4C Bond Maintenance Clarifying Shampoo
Supported
2
1
Partly supported
1
0
Stated by brand
2
3
Potential conflict
0
0

Perfect hair Day Shampoo

  • Provides long-lasting hydration and shineSupportedHelps hair feel hydrated.
  • Leaves hair soft and more manageablePartly supportedA little slip, not a lot.
  • Formulated to be gentle on the scalpStated by brandCan’t be confirmed from label.
  • Delivers 72-hour hydration with every washSupportedHelps hair feel hydrated.
  • Keeps hair cleaner and healthier for longerStated by brandCan’t be confirmed from label.

Nº.4C Bond Maintenance Clarifying Shampoo

  • Deeply cleanses buildup, restoring color vibrancy, shine, and softnessStated by brandCan’t be confirmed from label.
  • Clinically proven to remove chlorine, metals & minerals from hard water, excess oil, product buildup, and pollutionStated by brandOnly the brand’s testing shows this.
  • Free of sulfates, silicones, phthalates, parabens, MIC/MIT, proteinSupportedGentler on colour and coils.
  • Color safe, stylist & dermatologist tested, vegan, extension safeStated by brandOnly the brand’s testing shows this.

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 how it cleanses. Living Proof Perfect hair Day Shampoo draws complaints about the packaging; Olaplex Nº.4C Bond Maintenance Clarifying Shampoo draws complaints about tangling and dryness.

Perfect hair Day Shampoo

Reviewers describe hair feeling notably clean, fresh, and soft after use, with a well-liked scent

general users

Long-term repeat buyers report years of consistent use, often switching to jumbo/refill sizes

long-term repeat customers

A minority of reviewers report pump dispenser malfunctions and difficulty dispensing from smaller/travel sizes lacking a pump

travel-size buyers

Some reviewers find the price steep even at sale pricing, though several feel the concentration/value justifies the cost over time

price-conscious repeat buyers

A few longtime users perceive the formula has changed from an earlier version, though this is not corroborated by any confirmed reformulation notice

longtime users

Nº.4C Bond Maintenance Clarifying Shampoo

Many reviewers note it is gentler than typical clarifying shampoos, leaving hair soft and full of body rather than stripped

general users

Reviewers consistently say a small amount cuts through hard-water buildup and chlorine without stripping hair the way other clarifying shampoos do

clarifying-shampoo users comparing it to other brands

Reviewers note the lather leaves little slip, making detangling harder right after rinsing, and recommend always following with conditioner

general users

A recurring minority of reviewers report increased scalp dryness, flaking or sensitivity, especially with more frequent use

sensitive-scalp 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.

$3.70/oz vs $8.50/oz — Living Proof Perfect hair Day Shampoo costs about 2.3× more per ounce than Olaplex Nº.4C Bond Maintenance Clarifying Shampoo.

$0.00/oz median $1.47/oz $17.29/oz $8.50/oz Perfect hair Day Shampoo $3.70/oz Nº.4C Bond Maintenance Cla

Every mark sits on one distribution because these are compared against the same set: 817 shampoos with a computable unit price.

Value readPerfect hair Day ShampooNº.4C Bond Maintenance Clarifying Shampoo
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.

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.

Perfect hair Day Shampoo vs Full ShampooLiving Proof · 100% function matchNº.4C Bond Maintenance Clarifying Shampoo vs Full ShampooLiving Proof · 96% function matchPerfect hair Day Shampoo vs Colour Shield Shampoo with Camu-Camu BerriesChristophe Robin · 100% function matchNº.4C Bond Maintenance Clarifying Shampoo vs Colour Shield Shampoo with Camu-Camu BerriesChristophe Robin · 96% function matchPerfect hair Day Shampoo vs Gentle Brightening ShampoodpHUE · 98% function matchNº.4C Bond Maintenance Clarifying Shampoo vs Gentle Brightening ShampoodpHUE · 94% function matchPerfect hair Day Shampoo vs Color Fresh ShampoodpHUE · 98% function matchNº.4C Bond Maintenance Clarifying Shampoo vs Color Fresh ShampoodpHUE · 94% function match

Perfect hair Day Shampoo · Nº.4C Bond Maintenance Clarifying Shampoo · All shampoos 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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