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Side by side

BioSilk Silk Therapy Original vs Sexy Hair Seal The Deal Split End Mender Lotion

90% function match · 8 of the 9 functions we compared match Formula overlap 28%. BioSilk Silk Therapy Original and Sexy Hair Seal The Deal Split End Mender Lotion 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.

  • Silk Therapy Original — protein-hungry hair
  • Seal The Deal Split End Mender Lotion — 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
BioSilk Silk Therapy Original — 2.26 oz container BioSilk

Silk Therapy Original

  • Finisher
  • Masstige
  • Sulfate-free
  • Moisture-rich
Sexy Hair Seal The Deal Split End Mender Lotion — container Sexy Hair

Seal The Deal Split End Mender Lotion

  • Finisher
  • Masstige
Price, size & price per ounce
$13–15 2.26 oz · $6.32/oz
$21.95 3.4 oz · $6.46/oz
Value / price positioning
Priced with its peers $$$$$ Masstige tier · costs less than 62% of the 79 serums we’ve priced
Upper-mid price for a end oil $$$$$ Masstige tier · costs more than 57% of the 8 end oils 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
High Humectants near the top — water-binding is a headline mechanism here. Your hair
None found No humectants found — nothing here pulls water into the hair. Your hair
Shine system Same
High A silicone or oil blend does the shine work here. Your hair
High A silicone or oil blend does the shine work here. Your hair
Slip / detangling
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Some Some slip, mostly from esters or silicones rather than conditioners. Your hair
Weight on hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
—
Fragrance
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. 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
Oils and butters Same
None No oils or butters in the list. Your hair
None No oils or butters in the list. Your hair
Fast-drying alcohol
Present Fast-drying alcohol is present — it speeds drying and can read dry on the hair. Your hair
—
Humidity resistance
—
Claimed The brand claims humidity resistance; the ingredient list cannot confirm it. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • 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
  • Dull-looking haira recognised shine system is present
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Dull-looking haira recognised shine system is present
  • Humid climatesthe brand claims humidity resistance
  • Short ingredient listsfifteen ingredients or fewer
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
  • Curly-method routinesthese silicones need a detergent to remove
  • Protein-sensitive hairthat goes stiff or straw-like on protein
  • Picking it up locallywe have it recorded in one channel only
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
Finisherserum
Finisherlotion
Where to buy
CHI Haircare · Ulta
Target
Free of
  • sulfate-free
—
Cruelty-free
—
Cruelty-free · PETA-listed
Scent
Scented, not described
—
Finish
shine
shine
Humidity claim
—
Yes
How often
as needed
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

IngredientSilk Therapy OriginalSeal The Deal Split End Mender Lotion
Dimethiconol
Buildup
#2Leading
#4Supporting

What only one of them carries

Silk Therapy Original

Seal The Deal Split End Mender Lotion

Full ingredient list — Silk Therapy Original (15)
Full ingredient list — Seal The Deal Split End Mender Lotion (5)
  • 1 Mango Butter
  • 2 Aloe Vera
  • 3 Cyclopentasiloxane
    • silicone
    • emollient
  • 4 Dimethiconol
    • silicone
    • emollient
  • 5 Hydrolyzed Protein
    • film former
    • protein
    • hydrolysed protein

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.

VerdictsSilk Therapy OriginalSeal The Deal Split End Mender Lotion
Supported
3
2
Partly supported
0
0
Stated by brand
2
3
Potential conflict
0
0

Silk Therapy Original

  • smooths and protectsSupportedSmoother strands, less frizz.
  • all hair typesStated by brandSee the fit panel instead.
  • helps prevent split endsSupportedReinforces a damaged strand.
  • adds shineSupportedReflects light for visible shine.
  • leave-in replenishing treatmentStated by brandCan’t be confirmed from label.

Seal The Deal Split End Mender Lotion

  • Seals & mends tips to reduce the appearance of split endsSupportedReinforces a damaged strand.
  • Thermal protection up to 450°FStated by brandOnly lab testing can show this.
  • Delivers moisture and flexibilityStated by brandCan’t be confirmed from label.
  • Reduces breakageSupportedReinforces a damaged strand.
  • Humidity resistantStated by brandMay help, but not measurable here.

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 frizz control. Sexy Hair Seal The Deal Split End Mender Lotion draws complaints about weight and residue or cast.

Silk Therapy Original

A very curly-haired customer uses it daily and says it controls frizz very well.

A customer who applies a few drops after drying says the formula lasts a long time and receives compliments on its scent.

A long-time user says a nickel-sized amount on damp or dry hair makes dry hair soft and shiny, while a little goes a long way.

A reviewer says it works well for thick curly hair after drying but leaves their straight thin hair looking oily and limp.

Seal The Deal Split End Mender Lotion

Seals and smooths split ends, particularly when used as an after-straightening or post-heat styling treatment.

reviewers using the product for split end repair and post-heat protection

Reduces frizz and tames flyaways effectively when applied to damp hair before blow-drying or styling.

reviewers who apply product to damp hair and report improved frizz control

Leaves a greasy, sticky, or crusty residue on hair if too much product is applied or if used on curly hair.

reviewers reporting unwanted heaviness, greasiness, or film-like buildup

Effectiveness varies significantly by hair type; works best on fine and straight hair but can weigh down or frizz curly hair.

reviewers with different hair textures reporting opposite results

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.

$6.32/oz vs $6.46/oz — within about the same cost per ounce.

Silk Therapy Original

Against 79 serums with a computable unit price.

Seal The Deal Split End Mender Lotion

Against 8 end oils with a computable unit price.

Value readSilk Therapy OriginalSeal The Deal Split End Mender Lotion
Label
Priced with its peersSits in the middle of the range for serums per ounce.
Upper-mid price for a end oilSits in the middle of the range for end oils 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.

Silk Therapy Original vs Blowout Defense SprayTricoci · 99% function matchSeal The Deal Split End Mender Lotion vs Caviar Anti-Aging Restructuring Bond Repair 3-in-1 Sealing SerumAlterna · 99% function matchSilk Therapy Original vs Color Charge Spray SerumKenra Platinum · 95% function matchSeal The Deal Split End Mender Lotion vs Mekabu Hydrating Shine SerumMasami · 99% function matchSilk Therapy Original vs Shiny Silver Ultra Shine SprayOne 'n Only · 94% function matchSeal The Deal Split End Mender Lotion vs Silk Infusion Botanical BlissCHI · 99% function matchSilk Therapy Original vs Mekabu Hydrating Shine SerumMasami · 89% function matchSeal The Deal Split End Mender Lotion vs Thick & Full Biotin & Collagen Weightless Oil MistOGX · 99% function match

Silk Therapy Original · Seal The Deal Split End Mender Lotion · All serums 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.
  • 6 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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