Skip to main content
BioSilk

Silk Therapy With Natural Coconut Oil Leave-In Treatment

Finisher / Hair oil, glossing

  • Finisher
  • oil
  • Sulfate-free
  • Moisture-rich
Size2.26 fl ozusual store size · 2 sizes
Price$21seen at one store · 2.26 oz
Price / oz$9.29/ozat 2.26 oz
Where to buy1 store

Add it to your products. We’ll tell you if it’s ever recalled.

Scent:

Reviewers describe it as coconut.

Strength: Strong

Manufacturer page: chi.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 23 factors we check.
  • A personalized routine built around your schedule, styling habits, and local weather.
  • 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.

Start your consultation

Upper-mid price for a hair oil

$9.29/oz at 2.26 oz, more than 57% of the 270 hair oils , which mostly run $3.15–14.77/oz. The cost less.

Price and stores

Great for

Protein-hungry hairthat stretches and stays stretched when wet
Maximum slipfor hair that tangles the moment it is wet
Dry, thirsty hairhumectants and emollients both sit up front
Coarse or dry hairthat absorbs everything you give it
Dull-looking haira recognised shine system is present
Aerosol avoidancea pump or tube, not a pressurised can

Maybe skip if

this product has a strong scent
Curly-method routinesthese silicones need a detergent to remove
Protein-sensitive hairthat goes stiff or straw-like on protein
Oily scalp or fine hairthat gets weighed down
Very dry or damaged hairit contains fast-drying alcohol

Whether a finisher this rich looks shiny or greasy on you depends on your strand thickness and how oily your hair gets. Your consultation answers that.

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.

Shine system Silicone serum

A silicone or oil blend does the shine work here.

Weight on the hair Rich

Heavy butters and waxes in the first eight ingredients.

Oils and butters Present, high in the list

Oils sit high in the list: a softening, coating formula.

Needs detergent to remove Yes

Water-insoluble silicones or waxes: a detergent wash is what removes them.

Fast-drying alcohol Present

Contains fast-drying alcohol, which speeds drying but can leave hair feeling dry.

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
C13-14 Isoalkane emollient Softens and smooths the strand Shine
Dimethiconol silicone The shine system Buildup
Isododecane solvent The base everything else is dissolved in Shine
Alcohol Denat. drying alcohol Speeds drying but can leave hair feeling dry Drying
Cocos Nucifera (Coconut) Oil oil The shine and softening system Shine
Ethyl Ester Of Hydrolyzed Silk conditioning agent Conditions and softens so hair combs through Protein
Panthenol humectant Pulls water into the hair Detangles
C12-15 Alkyl Benzoate light ester Light slip without much weight Shine
Phenoxyethanol preservative Keeps the product from spoiling Stabilizes
FragranceFragrance (Parfum) fragrance The scent Fragrance
Benzyl Benzoate fragrance The scent Fragrance
Coumarin fragrance The scent Fragrance
What the list leaves out, and what it carriesThe list carries no sulfates. Protein sits high: this is a strengthening step rather than a moisture one. Fragrance is on the label. Heavier butters sit in the working part of the list.
Full ingredient list (12)

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 C13-14 Isoalkane
    General function

    A light carrier that spreads other ingredients and leaves a dry finish.

    Leading ingredient

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

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

    Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

    • emollient
    • solvent
  • 2 Dimethiconol
    General function

    A high-shine silicone often paired with dimethicone for a smoother, glossier finish.

    Leading ingredient

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

    May suitClimate-sensitive or frizz-prone hair

    A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

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

    Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.

    May not suitBuild-up-sensitive routines

    Dimethicone does not disperse in water. On a routine that skips detergent it stays on the hair and accumulates wash after wash.

    PubChem
    • silicone
    • emollient
  • 3 Isododecane
    General function

    A fast-evaporating carrier that lets oils and polymers spread thinly, then leaves nothing behind.

    Leading ingredient

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

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

    Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

    PubChem
    • solvent
    • emollient
  • 4 Alcohol Denat.
    General function

    Fast-drying alcohol used to make sprays set quickly. In leave-on products it can leave hair feeling dry, especially in high position on the list.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

    May suitFine or easily flattened hair

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

    May not suitDry, coarse, or high-porosity hair

    Porous hair gives water up easily as it is; a fast-evaporating solvent high on the list accelerates that.

    May not suitVery dry or highly damaged hair

    It evaporates quickly and takes some water with it. On hair already short of moisture, a formula built on a lot of it can finish drier than it started.

    PubChem
    • drying alcohol
    • solvent
  • 5 Cocos Nucifera (Coconut) Oil
    General function

    One of the few oils small enough to move into the strand, which is why it is used for pre-wash treatments. It can feel heavy or stiff on protein-sensitive hair.

    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

    Because it penetrates rather than sits on top, it works on hair that loses water through a worn cuticle instead of only slowing evaporation from the surface the way a non-penetrating oil does.

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

    A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

    May suitVery dry or highly damaged hair

    The exception to the class read: lauric acid is small and linear enough to enter the shaft rather than only coat it, and in comparison testing coconut oil was the one that reduced protein loss from washing on both undamaged and damaged hair.

    International Journal of Trichology
    • oil
    • emollient
  • 6 Ethyl Ester Of Hydrolyzed Silk
    General function

    A protein given a positive charge so it deposits where hair is damaged. It conditions and adds temporary firmness in one ingredient.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

    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.

    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.

    May suitVery dry or highly damaged hair

    Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.

    • conditioning agent
    • film former
    • protein
    • hydrolysed protein
  • 7 Panthenol
    General function

    Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

    May suitFine or easily flattened hair

    It hydrates without adding oil or a film, which is the combination fine hair usually needs.

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

    Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

    May suitVery dry or highly damaged hair

    A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

    PubChem
    • humectant
    • conditioning agent
    • vitamin
  • 8 C12-15 Alkyl Benzoate
    General function

    A dry-feeling ester used for a silky, non-greasy finish - a common silicone substitute.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

    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
  • ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
  • 9 Phenoxyethanol
    • preservative
  • 10 Fragrance · Fragrance (Parfum)
    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 Benzyl Benzoate
    General function

    A fragrance component with a faint balsamic scent, named separately on the label because it is 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
  • 12 Coumarin
    General function

    A sweet, hay-like fragrance component listed separately as a recognised 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

  • 5 emollients
  • 3 solvents
  • 3 fragrances
  • 2 named fragrance allergens
  • 1 silicone
  • 1 drying alcohol
  • 1 oil
  • 1 conditioning agent
  • 1 film former
  • 1 protein
  • 1 hydrolysed protein
  • 1 humectant
  • 1 conditioning agent
  • 1 vitamin

Ingredient list captured 2026-09-08. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 2.26 oz

Seen at $21 1 store · checked Sep 8
Good value under $4 Under $1.90/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 $4 line; products that do this job typically go for about $13 at this size.

Show the price ladder
Where we’ve seen it1 listing · 1 store

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. 2.26 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 $21 is the price we have observed for the 2.26 oz. We need three stores before we call a price commonly seen.
  3. Good value under $4 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $1.90/oz; at 2.26 oz that is $4. Under that line you are paying less than most of them.
  4. About $13 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 2.26 oz.

Formula

Formula score
8 of 10

A complete formula at an ordinary price: mid-range per ounce among hair oils, with the working systems in place.

How the score is counted
  • 4 products that do the same job cost less per ounce
  • Costs more per ounce than 57% of the 270 hair oils we’ve priced
  • Covers 5 of the 6 things a hair oil should do
  • Masstige tier, sold at Brand website and Grocery / mass
  • A shine systemThe silicone, oil, or ester that produces gloss.3 pts
  • A weightless carrierDelivers the shine without leaving grease.2 pts
  • Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
  • An antioxidantKeeps the oils in the bottle from going off.1 pt
  • No drying alcohol in the first threeFast drying without leading on alcohol.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.

CHIFragrance-free CareOil Aloe Silk Oil Blend $3.67/oz $5.62/oz less
  • Fragrance-free
  • Unscented
  • Protein
· Close function
Function
  • Water-binding (humectants)
Also
  • Unscented
  • 6 oz bottle
  • Sold through salons
Compare
HaskLowest cost per oz Argan Oil Repairing Shine Oil $0.76/oz $8.53/oz less
  • Protein
  • Rich
  • Shine
· Close function
Function
  • Fast-drying alcohol
Also
  • Drugstore tier
  • 3.3 oz bottle
Compare
CHIClose function Aloe Vera Oil $1.25/oz $8.04/oz less
  • Rich
  • Shine
  • No aerosol
Function
  • Water-binding (humectants)
  • Protein
Also
  • Salon tier
  • 3 oz bottle
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

Built for curly to coily hair

Final decision

Should you buy it?

A solid pick for the hair it suits
Best user

Soft, over-stretchy hair, for protein high in the formula and real detangling slip

Biggest tradeoff

Less suited to anyone sensitive to fragrance, curly-method routines, or hair that stiffens on protein

Best alternative if not

Consider CHI CareOil Aloe Silk Oil Blend, 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.

4
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
1
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Provides superior moisture replenishment

Humectants or rich emollients sit in the first eight ingredients.

  • C13-14 Isoalkane
  • Dimethiconol
  • Isododecane
Supported

Helps hair feel hydrated.

Fortifies weak strands

Protein sits in the first eight ingredients.

  • Ethyl Ester Of Hydrolyzed Silk
Supported

Reinforces a damaged strand.

Helps prevent split ends

Protein sits in the first eight ingredients.

  • Ethyl Ester Of Hydrolyzed Silk
Supported

Reinforces a damaged strand.

Paraben Free

No parabens appear in the ingredient list.

—

Supported

Preserved without parabens.

Gluten Free

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

—

Stated by brand

Can’t be confirmed from label.

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.

Reviewers repeatedly say the oil reduces frizz and leaves hair noticeably smoother and shinier

mixed hair types, including curly/wavy and fine straight hair

The coconut fragrance splits opinion: most reviewers describe it as pleasant and long-lasting, but a recurring minority find it too strong or overpowering

general reviewers across several years of purchases

More from BioSilk

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.
  • 5 sources consulted for this product (3 manufacturer or regulatory, 1 retailer, 1 editorial), last checked 2026-09-08.
  • Ingredient references are linked for 7 of 11 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 2026-09-22.

Hair Care Consultation

A care plan made for your hair and goals, then follow-up questions and plan updates.

  • Answers to your hair concerns
  • Formula-based product picks
  • Routines for your lifestyle and preferences
  • Updates for weather, needs and goals

$49with 60 days of follow-ups

Start my consultation