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Side by side

Bed Head A Glass Act Heat & UV Shield Oil vs Garnier Fructis Sleek & Shine Sleek & Stay Heat-Activated Serum

86% function match · 8 of the 10 functions we compared match Formula overlap 0%. Bed Head A Glass Act Heat & UV Shield Oil and Garnier Fructis Sleek & Shine Sleek & Stay Heat-Activated Serum share no ingredient among each other's most prominent — which does not stop them doing the same job.

These sit in different steps of a routine — Bed Head A Glass Act Heat & UV Shield Oil is a heat protectant and Garnier Fructis Sleek & Shine Sleek & Stay Heat-Activated Serum is a leave-in. Comparing their formulas is fair; treating one as a replacement for the other is not.

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.

  • A Glass Act Heat & UV Shield Oil — protein-sensitive hair
  • Sleek & Shine Sleek & Stay Heat-Activated Serum — heat styling

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
Bed Head A Glass Act Heat & UV Shield Oil — brand photograph Bed Head

A Glass Act Heat & UV Shield Oil

  • Heat protectant
  • Masstige
  • Sulfate-free
  • Protein-free
Garnier Fructis Sleek & Shine Sleek & Stay Heat-Activated Serum — 1.7 oz container Garnier Fructis

Sleek & Shine Sleek & Stay Heat-Activated Serum

  • Leave-in
  • Drugstore
  • Sulfate-free
  • Protein-free
Price, size & price per ounce
$13.99 3.62 oz · $4.83/oz
$8.67 1.7 oz · $5.13/oz

Compared at different sizes — 3.62 oz against 1.7 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Priced with its peers $$$$$ Masstige tier · costs less than 53% of the 224 heat protectants we’ve priced
Upper-mid price for a leave-in $$$$$ Drugstore tier · costs more than 59% of the 916 leave-ins we’ve priced
Best for hair types
Straight–Curly Smoothing and thermal products span straight through curly hair. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Same
Moderate Humectants in the working part of the formula. Your hair
None found No humectants found — nothing here pulls water into the hair. Your hair
Slip / detangling Same
Some Some slip, mostly from esters or silicones rather than conditioners. Your hair
Some Some slip, mostly from esters or silicones rather than conditioners. Your hair
Weight on hair Same
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your 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
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. 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
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 Differs
—
None No oils or butters in the list. Your hair
Fast-drying alcohol Same
None No fast-drying alcohol in the list. Your hair
—
Heat protection
—
Stated to 450°F The brand states a protection temperature — a label claim, not a measurement. Your hair
Formula completeness
out of 10
A simple formula
out of 10
A simple formula
Who should choose this
  • Protein-sensitive hairthat stiffens when protein is added
  • Very dry hairno fast-drying alcohol in the list
  • Sun and colour fadea UV filter is in the list
  • A wide range of haira middle-of-the-range weight
  • Heat stylingthe brand states protection to 450°F
  • Protein-sensitive hairthat stiffens when protein is added
  • Curl definitionfilm formers hold a clump together
  • 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
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • 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
Heat protectantoil
Leave-inserum
Where to buy
Brand website · Grocery / mass
Brand website · Target
Free of
  • sulfate-free
  • protein-free
  • sulfate-free
  • protein-free
Scent
Scented, not described
Fresh & airy
Heat protection
—
up to 450°F

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

IngredientA Glass Act Heat & UV Shield OilSleek & Shine Sleek & Stay Heat-Activated Serum
Fragrance
Fragrance
#5Below the 1% line
#4Below the 1% line

What only one of them carries

A Glass Act Heat & UV Shield Oil

Sleek & Shine Sleek & Stay Heat-Activated Serum

Full ingredient list — A Glass Act Heat & UV Shield Oil (19)
Full ingredient list — Sleek & Shine Sleek & Stay Heat-Activated Serum (4)

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.

VerdictsA Glass Act Heat & UV Shield OilSleek & Shine Sleek & Stay Heat-Activated Serum
Supported
1
2
Partly supported
0
2
Stated by brand
2
2
Potential conflict
0
0

A Glass Act Heat & UV Shield Oil

  • Protects hair with UV and heat defense up to 230°C/450°FStated by brandOnly lab testing can show this.
  • Smooths frizz and reduces the appearance of split endsStated by brandCan’t be confirmed from label.
  • Adds shine without grease or heavinessSupportedReflects light for visible shine.

Sleek & Shine Sleek & Stay Heat-Activated Serum

  • Heat-activated leave-in anti-frizz hair serumSupportedSmoother strands, less frizz.
  • Ultra glassy sleek that lasts up to 5 washesStated by brandCan’t be confirmed from label.
  • Heat protection up to 450FPartly supportedSold for hot tools; untestable here.
  • Non-greasy and water-resistant formulaPartly supportedDepends how fine your hair is.
  • Infused with alpha-silanes for long-lasting smoothnessStated by brandCheck the position, not the name.
  • Formulated without parabens, phthalates, and DMDM HydantoinSupportedPreserved without parabens.

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 a light feel and frizz control. Bed Head A Glass Act Heat & UV Shield Oil draws complaints about weight.

A Glass Act Heat & UV Shield Oil

many reviewers say a small amount smooths frizz and adds shine without feeling greasy on fine or thin hair

reviewers with fine, thin or blonde hair applying it after showering or before blow-drying

several reviewers say repeated use before heat styling noticeably reduced frizz and split ends over time

reviewers using it consistently before blow-drying, straightening or curling

reviewers repeatedly describe the scent as pleasant, fruity or citrus and not overpowering

general reviewers

several reviewers with fine or thick hair report the oil makes hair look or feel oily and weighed down when more than a pea-sized amount is used

reviewers who used more than the recommended small amount

Sleek & Shine Sleek & Stay Heat-Activated Serum

Leaves hair smoother and frizz-free without feeling weighed down

Effective, affordable heat protectant, works well on thick curly-wavy hair

Develops a fishy/peculiar odor over time for some users

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.

$4.83/oz vs $5.13/oz — within about the same cost per ounce.

A Glass Act Heat & UV Shield Oil

Against 224 heat protectants with a computable unit price.

Sleek & Shine Sleek & Stay Heat-Activated Serum

Against 916 leave-ins with a computable unit price.

Value readA Glass Act Heat & UV Shield OilSleek & Shine Sleek & Stay Heat-Activated Serum
Label
Priced with its peersSits in the middle of the range for heat protectants per ounce.
Upper-mid price for a leave-inSits in the middle of the range for leave-ins 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.

A Glass Act Heat & UV Shield Oil vs Olive Oil Thermalast Heat Protection SerumORS · 90% function matchSleek & Shine Sleek & Stay Heat-Activated Serum vs Mega Sleek 96H Anti-Frizz TopcoatMatrix · 100% function matchA Glass Act Heat & UV Shield Oil vs All-In-One Multi-Benefit OilBiolage · 90% function matchSleek & Shine Sleek & Stay Heat-Activated Serum vs Mega Sleek 96H Anti-Frizz Topcoat Smoothing Hair SerumMatrix · 99% function matchA Glass Act Heat & UV Shield Oil vs Royal Blowout Heat Styling SprayOribe · 86% function matchSleek & Shine Sleek & Stay Heat-Activated Serum vs Humidity-Defying Serumion · 99% function matchA Glass Act Heat & UV Shield Oil vs Mega Sleek 96H Anti-Frizz TopcoatMatrix · 86% function matchSleek & Shine Sleek & Stay Heat-Activated Serum vs Olive Oil Thermalast Heat Protection SerumORS · 95% function match

A Glass Act Heat & UV Shield Oil · Sleek & Shine Sleek & Stay Heat-Activated Serum · All heat protectants 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.
  • 7 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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