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Side by side

CHI BioSilk Color Therapy Lock and Protect vs CHI Keratin Silk Infusion

76% function match · 7 of the 10 functions we compared match Formula overlap 30%. CHI BioSilk Color Therapy Lock and Protect and CHI Keratin Silk Infusion 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.

  • BioSilk Color Therapy Lock and Protect — protein-hungry hair
  • Keratin Silk Infusion — protein-hungry 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
CHI

BioSilk Color Therapy Lock and Protect

  • Leave-in
  • Drugstore
  • Sulfate-free
  • Moisture-rich
CHI Keratin Silk Infusion — 6 oz container CHI

Keratin Silk Infusion

  • Leave-in
  • Salon
  • Sulfate-free
Price, size & price per ounce
$11.99 5.64 oz · $2.13/oz
$33–38 6 oz · $5.92/oz
Value / price positioning
Priced with its peers $$$$$ Drugstore tier · costs less than 51% of the 481 leave-ins we’ve priced
Same job for less elsewhere $$$$$ Salon tier · costs more than 77% of the 481 leave-ins we’ve priced
Best for hair types
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Curly–Coily A heavy formula: coarse, curlier strands carry it without flattening. Your hair
Moisture level Differs
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Moderate Humectants in the working part of the formula. Your hair
Oils and butters Same
Moderate Oils sit high in the list — a softening, coating formula. Your hair
Moderate Oils sit high in the list — a softening, coating formula. 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 Differs
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Rich Heavy butters and waxes in the first eight ingredients. 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
Prominent Protein high in the list — a strengthening formula, not a moisture one. Your hair
Prominent Protein high in the list — a strengthening formula, not a moisture one. Your hair
Silicone / wax buildup Same
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
Moderate Your hair
Moderate Your hair
Formula completeness
out of 10
Covers the core
out of 10
Covers the core
Who should choose this
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Curl definitionfilm formers hold a clump together
  • Very dry hairno fast-drying alcohol in the list
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Curl definitionfilm formers hold a clump together
  • Coarse or dry hairthat absorbs everything you give it
  • Very dry hairno fast-drying alcohol in the list
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Protein-sensitive hairthat goes stiff or straw-like on protein
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Protein-sensitive hairthat goes stiff or straw-like on protein
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
Leave-incream
Leave-inserum
Where to buy
Brand website · Specialty beauty
Brand website · Target
Free of
  • sulfate-free
  • sulfate-free
Vegan
Not vegan · ingredient list
Not vegan · ingredient list
Scent
Scented, not described
Scented, not described
How often
every wash
—

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.

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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

IngredientBioSilk Color Therapy Lock and ProtectKeratin Silk Infusion
Water
Neutral
#1Leading
#10Secondary
Glycerin
Moisturizes
#4Supporting
#11Secondary
Hydrolyzed Silk
Protein
#5Supporting
#5Supporting
Argania Spinosa Kernel Oil
Softens
#8Supporting
#8Supporting
Dimethiconol
Buildup
#14Below the 1% line
#2Leading
Fragrance
Fragrance
#30Below the 1% line
#21Below the 1% line
Citronellol
Fragrance
#33Below the 1% line
#23Below the 1% line

What only one of them carries

BioSilk Color Therapy Lock and Protect

Keratin Silk Infusion

Full ingredient list — BioSilk Color Therapy Lock and Protect (36)
Full ingredient list — Keratin Silk Infusion (34)

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.

VerdictsBioSilk Color Therapy Lock and ProtectKeratin Silk Infusion
Supported
4
2
Partly supported
0
0
Stated by brand
2
1
Potential conflict
0
0

BioSilk Color Therapy Lock and Protect

  • Locks in moistureSupportedHelps hair feel hydrated.
  • Strengthens by helping seal the cuticleSupportedReinforces a damaged strand.
  • Helps keeps hair color vibrant and richStated by brandCan’t be confirmed from label.
  • Protects against color fade with antioxidantsSupportedLess fade per wash.
  • This therapeutic leave-in treatment for color-treated hair strengthens and protects with maracuja oil, silk, and red tea extract to prevent color loss and maintain vibrancy.SupportedLess fade per wash.
  • Apply to hair ends and leave in on non-shampoo days for daily nourishment and protection.Stated by brandHow to use it, not a claim.

Keratin Silk Infusion

  • Promotes long-lasting, healthier hairStated by brandCan’t be confirmed from label.
  • Adds shine and elasticitySupportedReflects light for visible shine.
  • Helps prevent future breakageSupportedReinforces a damaged strand.

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 shine. CHI BioSilk Color Therapy Lock and Protect draws complaints about tangling and dryness.

BioSilk Color Therapy Lock and Protect

Long wavy and dry or damaged hair is where the praise is strongest: it smooths frizz before a blow-dry and is called a miracle for dry hair, with one reviewer glad it is free of citric acid.

long wavy hair, dry or damaged hair, one citric-acid-sensitive reviewer

Reviewers with colour-treated hair say a small amount on damp ends leaves hair soft, shiny and detangled without stripping colour, and several rebuy it after finding it again.

colour-treated hair, repeat buyers

The main complaint is texture: some found it tacky or hard to spread, needing a lot of product and then leaving hair heavy, and one expected an oil rather than a cream.

the three-star reviewers

A few say their colour still faded and it only helped with detangling, or that it left hair dry; two critical reviews concern a broken seal on delivery rather than the product.

the 16% one-to-three-star reviewers

Keratin Silk Infusion

Works well across hair textures including wavy 2a hair, adding shine and health

Dramatically softens damaged/color-treated hair ("hasn't been this soft since I was a child")

Reformulated version feels thinner/more watery and underperforms vs. the original formula after flat-ironing

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.

$2.13/oz vs $5.92/oz — CHI Keratin Silk Infusion costs about 2.8× more per ounce than CHI BioSilk Color Therapy Lock and Protect.

$0.01/oz median $2.17/oz $76.00/oz $2.13/oz BioSilk Color Therapy Lock $5.92/oz Keratin Silk Infusion

Every mark sits on one distribution because these are compared against the same set: 481 leave-ins with a computable unit price.

Value readBioSilk Color Therapy Lock and ProtectKeratin Silk Infusion
Label
Priced with its peersSits in the middle of the range for leave-ins per ounce.
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.

BioSilk Color Therapy Lock and Protect vs Keratin Protein 5-in-1 Leave in SprayHask · 95% function matchKeratin Silk Infusion vs Luscious Island Protein MistOriginal Sprout · 93% function matchBioSilk Color Therapy Lock and Protect vs Curlific! Moisture Rich Leave-inAphogee · 95% function matchKeratin Silk Infusion vs Protective Protein Hair MistOriginal Sprout · 93% function matchBioSilk Color Therapy Lock and Protect vs Prep Detangling Hair PrimerBumble and bumble · 93% function matchKeratin Silk Infusion vs Keratin Leave-In Repair TreatmentPantene · 86% function matchBioSilk Color Therapy Lock and Protect vs Luxury Black Seed Oil Blend Leave-In ConditionerCHI · 88% function matchKeratin Silk Infusion vs Heated.DefenseKevin Murphy · 86% function match

BioSilk Color Therapy Lock and Protect · Keratin Silk Infusion · All leave-ins 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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