The Rescuer Weightless Serum
Finisher / Serum, medium-weight
- Finisher
- serum
- Sulfate-free
- Moisture-rich
- Cruelty-free · PETA-listed
Add it to your products. We’ll tell you if it’s ever recalled.
Scent:
The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.
Manufacturer page: us.johnfrieda.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 22 factors we check.
- A personalized routine built around your schedule, styling habits, and local weather.
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- 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.
Show all 22 factors we check
The rest of what your plan weighs on this product.
The consultation builds your hair profile, checks every factor in this table against it, and tells you where this product fits or what to use instead.
Start your consultation$49 once, with 60 days of follow-up questions and plan updates. Nothing renews, and you never have to buy a product.
Your avoid-list
Priced with its peers
$7.59/oz at 1.69 oz, less than 56% of the 136 serums , which mostly run $3.94–14.80/oz. The cost less.
Great for
Maybe skip if
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.
Middle of the range: noticeable on fine hair, light on coarse hair.
No oils or butters in the list.
Water-insoluble silicones or waxes: a detergent wash is what removes them.
No fast-drying alcohol in the list.
Fragrance is in the first eight ingredients, so it makes up a larger share of the formula.
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.
| Ingredient | What it does | Why it matters | Chip |
|---|---|---|---|
| WaterWater/Aqua/Eau | solvent | The base everything else is dissolved in | Neutral |
| Glycerin | humectant | Pulls water into the hair | Moisturizes |
| Phenoxyethanol | preservative | Keeps the product from spoiling | Stabilizes |
| Brassica Campestris/Aleurites Fordi Oil Copolymer | wax | Holds shape and adds weight | Buildup |
| Acrylates/C10-30 Alkyl Acrylate Crosspolymer | thickener | Sets the texture | Holds |
| Arginine | amino acid | Small protein fragments that bind water | Protein |
| Butylene Glycol | humectant | Pulls water into the hair | Moisturizes |
| FragranceFragrance/Parfum | fragrance | The scent | Fragrance |
| Bis-4-Pca DimethiconeBis-4 Pca Dimethicone | silicone | A little shine | Buildup |
| Hydrolyzed Lupine Protein | film former | A supporting film former | Protein |
| Disodium Peg-12 Dimethicone Sulfosuccinate | mild anionic cleanser | — | Buildup |
| Hexyl Cinnamal | fragrance | The scent | Fragrance |
Full ingredient list (28)
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
Water
· Water/Aqua/Eau
General function
The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
- solvent
-
2
Glycerin
General function
Glycerin, also called glycerol, attracts moisture and mixes completely with water.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
Scientific ReportsMay suitDry, coarse, or high-porosity hairHigh-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.
May suitVery dry or highly damaged hairBinds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.
DependsClimate-sensitive or frizz-prone hairWater moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.
- humectant
-
3
Phenoxyethanol
General function
The most common modern preservative; it keeps the product free of bacteria and mould. It sits well below 1% of the formula.
Leading ingredientPubChemListed in the first three ingredients, it is likely a structural part of this formula.
- preservative
-
4
Brassica Campestris/Aleurites Fordi Oil Copolymer
General function
A plant-oil wax used as a vegan alternative to beeswax for hold and sheen.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
May suitFrizz-prone, damaged, or high-friction hairEmollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
May suitMaximum-hold stylingA wax holds by staying solid on the strand, which gives grip and separation rather than a set film that cracks.
May not suitBuild-up-sensitive routinesWaxes do not dissolve in water. They need a detergent wash to come off, and they are the classic cause of a coated feel.
- wax
- film former
- emollient
-
5
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
General function
A gel-forming thickener that also keeps oils suspended. It contributes a little hold.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
May suitClimate-sensitive or frizz-prone hairA set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.
May suitMaximum-hold stylingSynthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.
DependsBuild-up-sensitive routinesSome acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.
- thickener
- polymer
- film former
-
6
Arginine
General function
An amino acid that holds water and carries a positive charge, so it is drawn to damaged spots on the strand.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChemMay suitVery dry or highly damaged hairAmino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
DependsProtein-sensitive hairThe lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
- amino acid
- humectant
-
7
Butylene Glycol
General function
A light humectant and carrier that helps extracts dissolve.
Supporting ingredientListed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChemMay suitFine or easily flattened hairLight and water-binding rather than oily, so it adds less weight than oils or butters do.
May suitVery dry or highly damaged hairA small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- humectant
- solvent
- ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
-
8
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 zoneIt 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 routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance
-
9
Bis-4-Pca Dimethicone
· Bis-4 Pca Dimethicone
General function
A silicone. Silicones coat the strand for slip, shine and frizz control; unless the name carries PEG or PPG, removing one takes a detergent rather than water.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitClimate-sensitive or frizz-prone hairA 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 hairLays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.
- silicone
- conditioning agent
-
10
Hydrolyzed Moringa Oleifera Seed Extract
- botanical extract
-
11
Squalane
General function
The fully hydrogenated form of squalene, now made from olive or sugarcane rather than shark liver. Hydrogenation is what makes it so slow to oxidise; it spreads very lightly and absorbs without a greasy film.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitFrizz-prone, damaged, or high-friction hairDeposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.
- emollient
- conditioning agent
- 12 Ectoin
-
13
Hydrolyzed Lupine Protein
General function
A protein broken into fragments small enough to cling to the hair. It fills gaps on damaged strands and firms the feel for a few washes; too much reads as stiff.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitFrizz-prone, damaged, or high-friction hairFilling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.
May suitMaximum-hold stylingFilm 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 hairHydrolysed 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.
- film former
- protein
- hydrolysed protein
-
14
Tocopherol
- antioxidant
- vitamin
-
15
Ethylhexylglycerin
General function
A preservative booster that also adds a little softness. Almost always paired with phenoxyethanol.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitFrizz-prone, damaged, or high-friction hairEmollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- preservative
- emollient
-
16
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
- film former
- polymer
-
17
Isohexadecane
General function
A light, quickly evaporating carrier that spreads silicones and oils thinly, then leaves.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitFrizz-prone, damaged, or high-friction hairEmollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- solvent
- emollient
-
18
Aminomethyl Propanol
General function
A base used in trace amounts to neutralise acidic hold polymers so they thicken and set properly.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemDependsFrizz-prone, damaged, or high-friction hairpH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.
- pH adjuster
-
19
Disodium Peg-12 Dimethicone Sulfosuccinate
General function
A fatty ester. Esters give slip and a smooth after-feel; lighter ones read dry and silky, heavier ones read rich.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitBuild-up-sensitive routinesThe PEG- and PPG-modified silicones disperse in water, so ordinary washing carries them off instead of leaving a film to accumulate.
May suitClimate-sensitive or frizz-prone hairA 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 hairDelivers the slip and surface smoothing of a silicone without needing a detergent wash to remove it afterwards.
- mild anionic cleanser
- emollient
- light ester
- silicone
- water-soluble silicone
-
20
Polysorbate 80
- emulsifier
- solubilizer
-
21
Hexyl Cinnamal
General function
A jasmine-like fragrance component named separately as a recognised allergen.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
22
Sodium Benzoate
- preservative
-
23
Tetramethyl Acetyloctahydronaphthalenes
General function
A synthetic musk or woody-amber note used as a fragrance base.
Estimated lower-concentration zoneIt 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 routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
-
24
Sorbitan Oleate
- emulsifier
-
25
Citronellol
General function
A rose-like fragrance component named separately as a recognised allergen.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay not suitFragrance-sensitive routinesOne 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.
- fragrance
- named fragrance allergen
-
26
1,2-Hexanediol
General function
A preservative booster that also holds a little moisture and helps other ingredients dissolve.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitFine or easily flattened hairLight and water-binding rather than oily, so it adds less weight than oils or butters do.
May suitVery dry or highly damaged hairA small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- preservative
- humectant
- solvent
-
27
Caprylyl Glycol
General function
A gentle preservative helper that also holds a little moisture.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
PubChemMay suitVery dry or highly damaged hairHumectants bind water into the strand, and water — not oil — is what makes dry hair flexible instead of brittle.
DependsClimate-sensitive or frizz-prone hairA humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- preservative
- humectant
-
28
Benzoic Acid
- preservative
What the whole list adds up to
- 6 preservatives
- 5 humectants
- 5 emollients
- 4 solvents
- 4 film formers
- 4 fragrances
- 2 polymers
- 2 silicones
- 2 conditioning agents
- 2 emulsifiers
- 2 named fragrance allergens
- 1 wax
- 1 thickener
- 1 amino acid
Ingredient list captured 2026-10-22. Formulas change, so check the package in your hand when an ingredient matters to you.
Price · 1.69 oz
Priced above the products that do the same job. Stores sell it above the $3 line; products that do this job typically go for about $6 at this size.
Show the price ladder
Where we’ve seen it5 listings · 5 stores
-
BevMo!
$10.991.69 oz · $6.50/ozOct 22Lowest per oz
-
John Frieda (brand site)
$11.991.69 oz · $7.09/ozOct 7
-
John Frieda
$11.991.69 oz · $7.09/ozOct 22
-
Walmart
$13.671.69 oz · $8.09/ozOct 22
-
Cloud 10 Beauty
$15.521.69 oz · $9.18/ozOct 22
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. and 1 listing we don’t count, from grey-market or unverified sellers.
How we work this out
- 1.69 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.
- Commonly seen is the middle half of current prices for the 1.69 oz at recognised stores. We leave out the cheapest and most expensive quarters, so one sale or one overpriced listing can’t move it.
- Good value under $3 comes from the 6 products we score as doing the same job as this one. A quarter of them cost less than $1.99/oz; at 1.69 oz that is $3. Under that line you are paying less than most of them.
- About $6 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 1.69 oz.
Formula
A complete formula at an ordinary price: mid-range per ounce among serums, with the working systems in place.
How the score is counted
- Costs less per ounce than 56% of the 136 serums we’ve priced
- Covers 5 of the 6 things a serum should do
- Reviewers mention 2 things they like about how it performs
- Drugstore tier, sold at Brand website
- 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
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.
- Heat protect
- Alcohol-free
- Medium weight
- Function
- Also
- Heat protect
- Alcohol-free
- Medium weight
- Function
- Also
- Protein-free
- Alcohol-free
- No aerosol
- Function
- Also
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
Final decision
Should you buy it?
Good for the right personHair that craves moisture, looking for moisture that stays in and a formula with no drying alcohol
Not ideal for anyone sensitive to fragrance, curly-method routines, or anyone who will not scrunch out a cast
Nothing in our library matches it closely 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.
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.
Many reviewers say this serum feels light and does not leave their hair greasy or weighed down.
Reviewers across hair types, including fine and thin hairMany reviewers say it tames frizz and leaves hair feeling softer and smoother, often after only a few uses.
Reviewers with frizzy, dry or humidity-prone hairSeveral reviewers say the serum did little to change their frizz or texture, and some preferred other products.
Reviewers across hair types, including curly and thick hairSeveral reviewers say a small amount works best, since using more can leave hair heavy or slightly greasy.
Reviewers with thin or thick hairMany reviewers like the clean, light scent, though some find it faint or dislike it.
Reviewers across hair typesMore from John Frieda
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.
- 4 sources consulted for this product (0 manufacturer or regulatory, 2 retailer, 2 editorial), last checked 2026-10-31.
- Ingredient references are linked for 10 of 18 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 2026-10-22.
