Paul Mitchell Super Skinny Serum is a blowout primer from professional salon brand Paul Mitchell. It’s the #1 smoothing serum sold in salons per Kline data Q3 2024-Q2 2025, and it won TotalBeauty.com’s Reader’s Choice Award for Best Hair Serum in 2018.
The serum coats and seals each hair strand with silicones like Dimethicone and Dimethiconol, blocking humidity at the cuticle to prevent frizz. It delivers up to 450°F (232°C) thermal heat protection and reduces blow-dry time by approximately 10 minutes. At Ulta Beauty, 92% of 3,164 reviewers recommend it, citing ease of use, effectiveness, and scent as the top strengths.
But it’s not right for every hair type. Fine hair users risk greasiness from over-application, and daily users need a clarifying shampoo every two weeks to prevent silicone buildup. This review covers ingredients, real user feedback, comparisons to competitors like Olaplex No. 7 and John Frieda Frizz Ease, and who should buy it.
What Is Paul Mitchell Super Skinny Serum?
Paul Mitchell Super Skinny Serum is a best-selling blowout primer designed to reduce drying time, control frizz, and add shine to all hair types. The professional salon brand Paul Mitchell developed this serum to deliver silky-smooth results during heat styling. In fact, a single application on damp hair is all it takes.
Here’s something worth knowing: it’s ranked #1 smoothing serum sold in salons per Kline market data Q3 2024-Q2 2025. It also won TotalBeauty.com’s Reader’s Choice Award in 2018 for Best Hair Serum. That’s not a one-time fluke. That’s a product with real staying power.
The formula comes in a pump bottle with a vibrant fruity fragrance featuring notes of apple, berries, and sweet florals. Three sizes are available: 0.85 fl. oz. (25 ml), 5.1 fl. oz. (151 ml), and 8.5 fl. oz. (251 ml).
What Does Paul Mitchell Super Skinny Serum Do?
Paul Mitchell Super Skinny Serum acts as a blowout primer that smooths, conditions, and seals each hair strand while penetrating the cuticle to displace water and speed styling time. Think of it this way: it preps damp hair for the blow-dryer so the heat works faster and does less damage.
The serum provides up to 450°F (232°C) thermal heat protection, verified by third-party testing. That covers the full range of common blow-dryer and flat iron temperatures used in daily styling. So yes, you’re protected at the highest heat settings too.
Reviewers report a reduction in blow-drying time of approximately 10 minutes. The formula displaces moisture from the hair shaft before the blow-dryer is applied, so less heat time is needed to achieve smooth, finished results.
Who Is Paul Mitchell Super Skinny Serum For?
Paul Mitchell Super Skinny Serum is formulated for all hair types, including fine, thick, curly, wavy, and color-treated hair, with ideal results for those prone to frizz and flyaways. The lightweight silicone formula adjusts to hair density without the stickiness of heavier smoothing products.
Fine hair users, pay attention to this: dosage matters a lot here. Beautylish reviewer Lisa W. warns that ‘the thick formula will leave it really greasy’ on fine strands if more than one pump is applied. Start with half a pump. Build from there only if needed.
What Are the Ingredients in Paul Mitchell Super Skinny Serum?
Paul Mitchell Super Skinny Serum contains a silicone-forward formula built on Isododecane, Dimethicone, and Dimethiconol as its primary functional ingredients. The complete ingredient list includes: Isododecane, Dimethicone, Dimethiconol, Fragrance (Parfum), Hexamethylindanopyran, Hexyl Cinnamal, Benzyl Salicylate, Linalool, Limonene, Citrus Aurantium Peel Oil, Geraniol, Dimethyl Phenethyl Acetate, Amyl Cinnamal, Citronellol, Linalyl Acetate, and Acetyl Cedrene.
Here’s the thing about Isododecane: it’s a lightweight volatile solvent that gives the formula its non-greasy slip. It helps active silicones spread evenly across each strand without leaving residue, and evaporates during drying to reduce buildup. That’s why the serum doesn’t feel heavy in the hand.
The serum is certified vegan and cruelty-free, free from parabens and gluten, and safe for color-treated hair. The packaging uses 50% post-consumer recycled (PCR) materials. And that matters if you care about where your money goes.
Key Certifications:
- Vegan and cruelty-free certified
- Paraben-free and gluten-free
- Color-safe formula
- 50% post-consumer recycled (PCR) packaging
Are the Silicones in Super Skinny Serum Safe?
Yes. Dimethicone and Dimethiconol are widely used cosmetic silicones with established safety records, approved for use in hair and skin products globally. Both coat the hair shaft to smooth the cuticle without penetrating the scalp or entering the bloodstream.
Here’s what most people miss: some silicones in the formula are volatile and evaporate rather than build up. But Dimethiconol is non-volatile. It can accumulate on the hair shaft with daily use if a clarifying shampoo isn’t used at least every two weeks. So the silicones are safe, but the cleansing routine matters.
How Does Paul Mitchell Super Skinny Serum Work?
Paul Mitchell Super Skinny Serum works by coating and sealing each hair strand with lightweight silicones, primarily Dimethicone and Dimethiconol, forming a protective film that repels water and smooths the cuticle to eliminate friction and frizz. That film is the key. It sits between the hair and the air, blocking humidity at the source.
The proprietary Super Skinny Complex seals the raised edges of the hair cuticle, preventing atmospheric moisture from re-entering the strand. This sealing action keeps styles smooth and frizz-free even in high-humidity environments, from tropical climates to steam-filled bathrooms. Bottom line: the weather doesn’t win.
Application requires just one pump for most hair types. For long or thick hair above 12 inches (30 cm), two to three pumps provide full coverage before styling begins.
How to Use Super Skinny Serum:
- Wash and towel-dry hair until damp but not dripping.
- Dispense one pump of serum into clean palms.
- Rub palms together and apply evenly from mid-length to ends.
- Comb through to distribute product evenly across all strands.
- Blow-dry or style hair as desired using heat tools.
Does It Really Reduce Drying Time?
Yes. Paul Mitchell Super Skinny Serum penetrates the hair shaft to displace water before heat is applied, so the blow-dryer removes less moisture per pass. Reviewer Patricia J. Huerta at Reliefinbath.com reports a reduction of approximately 10 minutes in total blow-drying time. That’s not nothing.
Shorter heat exposure benefits color-treated hair in particular. Why? Color-treated hair loses dye molecules faster under prolonged heat. Shaving 10 minutes off the drying session preserves color vibrancy and reduces cumulative heat damage over weeks of daily use.
Does Paul Mitchell Super Skinny Serum Protect Against Heat?
Yes. Paul Mitchell Super Skinny Serum delivers up to 450°F (232°C) thermal heat protection, verified by third-party testing, covering the full temperature range of standard blow-dryers and flat irons. The protection kicks in the moment heat tools make contact with the hair.
Dimethicone forms a thin thermal barrier on each strand that absorbs heat energy before it reaches the cortex of the hair shaft. The result is reduced cuticle damage during high-heat styling, particularly for bleached or chemically treated hair. And that’s where most heat damage happens.
What Are the Benefits of Paul Mitchell Super Skinny Serum?
Paul Mitchell Super Skinny Serum delivers five core benefits: frizz control in humidity, reduced drying time, up to 450°F (232°C) heat protection, glossy shine, and lightweight conditioning, all without weighing hair down. And here’s the best part: all five happen from a single pump applied to damp hair.
The formula works across a wide range of hair types: curly, straight, wavy, fine, coarse, color-treated, and bleached. At Ulta Beauty, 92% of 3,164 reviewers recommend the product. That’s not a niche product winning over one hair type. That’s broad satisfaction across the board.
The concentrated formula means only one pump is needed per use. Beautylish reviewer Rachel R. reports that one 5.1 oz (151 ml) bottle lasts approximately one year with daily application. At $30 a bottle, that’s less than $0.08 (USD) per use. Hard to argue with that math.
Core Benefits:
- Frizz control and humidity resistance in any weather
- Reduced blow-drying time by up to 10 minutes
- Up to 450°F (232°C) thermal heat protection
- Glossy, non-greasy shine on all hair types
- Lightweight conditioning without buildup at correct dose
Does Paul Mitchell Super Skinny Serum Actually Control Frizz?
Yes. Paul Mitchell Super Skinny Serum delivers genuine frizz control, with the Tried and Tested Blog reviewer confirming the product ‘really does deliver on its claims to smooth, control frizz and add shine.’ The humidity-resistant formula keeps hair sleek even in high-moisture environments.
Licensed cosmetologist Hollee, with 9+ years of salon experience, confirms the serum effectively tames frizz and flyaways at a professional level. Here’s why it works: the silicone film on the cuticle blocks atmospheric moisture from entering the hair shaft. No moisture entry, no swelling. No swelling, no frizz.
Does Super Skinny Serum Add Shine Without Grease?
Yes. Super Skinny Serum adds a glossy, reflective finish by smoothing the cuticle surface so light bounces off each strand evenly, without the heavy or sticky residue of cream-based alternatives. Holleewood Hair reviewer describes a ‘smooth texture, lightweight without greasiness or stickiness.’
Shine stays non-greasy when one pump is used correctly on medium to thick hair. Does it turn greasy with more? Yes, it does. Two or more pumps on fine or thin hair causes a greasy appearance, per multiple reviewer reports. The good news? One pump is genuinely enough for most people.
What Do Paul Mitchell Super Skinny Serum Reviews Say?
Paul Mitchell Super Skinny Serum earns a 4.7 out of 5 star average from 3,164 verified reviews at Ulta Beauty, with 92% of reviewers recommending the product. Influenster adds a 4.85 out of 5 average from 134 reviews, with 88% giving a full 5 stars. That’s a remarkably consistent score across platforms.
Top review themes at Ulta include ‘Easy To Use’ mentioned 584 times, ‘Effective’ mentioned 557 times, and ‘Smells great’ mentioned 484 times. These aren’t outlier opinions. They’re the three most consistent experiences across thousands of individual buyers.
What Do Positive Reviewers Say About Super Skinny Serum?
Positive reviewers consistently describe transformative smoothness and shine on damaged, bleached, and frizzy hair, with one Ulta reviewer stating the serum ‘makes my hair look like actual human hair.’ Beautylish reviewer Jackie A. adds: ‘you don’t even know it’s there’ while the product delivers noticeable softness.
Long-term users reinforce the durability of results. Beautylish reviewer Rachel R. has used Super Skinny Serum for six consecutive years with no decline in performance. Holleewood Hair reviewer has used it since 2005. At some point, a product that consistent stops being a recommendation and starts being a staple.
What Are the Common Complaints About Super Skinny Serum?
The most common complaint is greasiness from over-application, particularly on fine hair where the concentrated formula overwhelms thin strands and leaves a heavy, oily residue. Beautylish reviewer Lisa W. specifically warns that the formula ‘will leave it really greasy’ on fine hair. So if you have fine hair, less is very much more.
A secondary complaint involves pump defects on older bottle versions. Reviewer Patricia J. Huerta at Reliefinbath.com reports the pump either breaking or malfunctioning after a few uses on earlier versions. Recent bottle designs appear improved, but it’s worth watching.
A third concern raised by one Ulta critic is that silicone coating ‘creates a heavy wax film’ that masks hair damage rather than repairing it. To be clear: this serum is not a repair treatment. It’s a smoothing primer. Those are two different jobs, and expecting one from the other creates disappointment.
Common Complaints:
- Greasy result if too much product is applied, especially on fine hair
- Pump defects reported on older bottle versions
- Silicone coating masks damage rather than repairing it
How Does Paul Mitchell Super Skinny Serum Compare to Competitors?
Paul Mitchell Super Skinny Serum positions itself as a professional salon-grade blowout primer at $30 (USD) for 5.1 oz (151 ml), competing against John Frieda Frizz Ease Serum, Olaplex No. 7 Bonding Oil, BioSilk Silk Therapy Serum, and Bed Head After Party Smoothing Cream. Each competitor targets frizz control, but they differ significantly in formula weight, ingredients, and purpose.
BioSilk Silk Therapy Serum is the closest alternative by ingredient profile. SkinSort community data shows a 68% ingredient match between the two products, making BioSilk the most similar substitute for buyers who want a budget-accessible option with a comparable silicone base.
Competitor Comparison:
| Product | Price | Size | Best For |
|---|---|---|---|
| Paul Mitchell Super Skinny Serum | $30 (USD) | 5.1 oz (151 ml) | Daily frizz control and blowouts |
| John Frieda Frizz Ease Serum | $10 (USD) | 1.69 oz (50 ml) | Budget frizz control |
| Olaplex No. 7 Bonding Oil | $20-$30 (USD) | 1 oz (30 ml) | Severe damage repair |
| Bed Head After Party Smoothing Cream | $15-$20 (USD) | 3.4 oz (100 ml) | Thick hair smoothing |
Paul Mitchell Super Skinny Serum vs. John Frieda Frizz Ease Serum?
John Frieda Frizz Ease Serum retails for approximately $10 (USD) for 1.69 oz (50 ml), making it the more affordable entry-level option, but Reliefinbath.com reviewer Patricia J. Huerta describes its formula as ‘sticky,’ limiting absorption and overall shine quality. And sticky is the opposite of what a smoothing serum should be.
Paul Mitchell Super Skinny Serum provides better absorption and a glossier, non-sticky finish. The price per ounce is higher, but the concentrated formula and availability in larger sizes improve long-term cost efficiency for daily users. For anyone blow-drying regularly, Paul Mitchell wins on value over time.
Paul Mitchell Super Skinny Serum vs. Olaplex No. 7 Bonding Oil?
Olaplex No. 7 Bonding Oil retails at $20 to $30 (USD) for just 1 oz (30 ml) and is marketed as a reparative treatment that rebuilds broken bonds within the hair shaft, rather than a surface-coating blowout primer. It’s heavier and better suited for severe damage repair, per Reliefinbath.com.
Paul Mitchell Super Skinny Serum delivers superior daily frizz control for regular styling sessions. Olaplex No. 7 targets structural repair. So what does that mean for you? If your main goal is a smooth daily blowout, Super Skinny Serum offers better daily value. Save Olaplex for when the damage is serious.
What Are the Side Effects of Paul Mitchell Super Skinny Serum?
Paul Mitchell Super Skinny Serum carries three primary reported side effects: greasiness from over-application, silicone buildup with daily use and insufficient cleansing, and a flattened appearance on fine hair when too much product is applied. No reviews report scalp irritation or allergic reactions.
The silicones coat the hair strand rather than the scalp, reducing direct skin contact. Fine hair users reduce side effect risk by applying the serum from mid-length to ends only, avoiding the roots where product accumulation most easily creates a flat, oily look.
Reported Side Effects:
- Greasiness on fine hair with over-application
- Silicone buildup without bi-weekly clarifying shampoo use
- Flattened appearance on thin strands from excess product
Can Paul Mitchell Super Skinny Serum Cause Buildup?
Yes. Dimethiconol is a non-volatile silicone that does not evaporate during drying and can accumulate on the hair shaft over time with daily use, eventually reducing the formula’s effectiveness and creating a dull, heavy coating. Reliefinbath.com reviewer reports needing a clarifying shampoo every two weeks to prevent residue accumulation.
Here’s the good news: buildup is preventable, not inevitable. Beautylish reviewer Rachel R. reports no noticeable buildup over six years of daily use, maintaining results by using a ‘gentle shampoo to clarify every couple of weeks.’ Clarify regularly and the buildup problem doesn’t materialize.
How Much Does Paul Mitchell Super Skinny Serum Cost?
Paul Mitchell Super Skinny Serum is available in three sizes, starting at $12 (USD) for the 0.85 fl. oz. (25 ml) travel size, $30 (USD) for the standard 5.1 fl. oz. (151 ml), and at a lower per-ounce rate for the 8.5 fl. oz. (251 ml) large bottle. Ulta Beauty offers a subscription discount to $28.50 through its Replenish and Save program.
Cost per use is notably low. At $30 for 5.1 oz and one pump per application, the bottle contains around 145 uses. Beautylish reviewer Rachel R. confirms one bottle lasts approximately one year with daily use. That puts the daily cost at under $0.08 (USD). For a salon-grade product, that’s a strong deal.
Is Paul Mitchell Super Skinny Serum Worth the Price?
Yes. Paul Mitchell Super Skinny Serum delivers mid-premium performance at $30 (USD) for 5.1 oz (151 ml), with a cost-per-use under $0.08 (USD) daily, lower than most competing serums sold in smaller sizes at similar or higher prices.
Licensed cosmetologist Hollee, with 9+ years of salon experience, endorses it directly: ‘The Paul Mitchell Super Skinny Serum is a premium product, and its performance truly reflects that.’ Salon professionals use this serum on paying clients. That’s a different kind of endorsement than a sponsored post.
Where Can You Buy Paul Mitchell Super Skinny Serum?
Paul Mitchell Super Skinny Serum is available at Ulta Beauty, Walmart, Walgreens, Amazon, and paulmitchell.com, with wide availability across both physical retail locations and online stores in the United States. The product is stocked consistently by major beauty and pharmacy retailers.
The serum cannot be shipped by air due to its flammability classification. Online buyers should confirm ground shipping availability when placing orders, particularly for express or next-day delivery options which may be restricted for this product category.
Where to Buy:
- Ulta Beauty (in-store and online, subscription available)
- Amazon (Prime eligible for ground shipping)
- Walmart (in-store and online)
- Walgreens (in-store and online)
- paulmitchell.com (direct from brand)
Is Paul Mitchell Super Skinny Serum Worth It?
Yes. Paul Mitchell Super Skinny Serum delivers on all core claims: frizz control in humidity, reduced drying time by up to 10 minutes, and heat protection up to 450°F (232°C), backed by a 4.7 out of 5 star average across 3,164 Ulta reviews and a 92% recommendation rate.
The serum is best suited for medium to thick, frizzy, wavy, or color-treated hair in regular blow-dry routines. Fine hair users should start with half a pump and increase only as needed to avoid greasiness. Daily users benefit from a clarifying shampoo every two weeks to prevent silicone buildup.
Those who follow silicone-free routines, including the Curly Girl Method or co-washing without sulfate shampoos, should skip this serum. The non-volatile Dimethiconol requires a clarifying shampoo for effective removal, making it incompatible with sulfate-free cleansing regimens.