No. 2 Deep Clean Fresh Cream Cleansing Foam
K-Beauty Foam Favorite
Verified reviewer
Pros & cons.
- +Sulfate-free surfactant system built on fatty acids is gentler than SLS-based alternatives
- +Exceptionally dense, whipped-cream foam from minimal product — impressive foam-to-product ratio
- +Very affordable at around $11 for a tube that lasts 2-3 months
- +Effective at dissolving excess sebum and reducing blackhead buildup over time
- +Simple ingredient list with no unnecessary fillers or gimmicky additives
- +Pairs seamlessly with oil cleansers for an efficient double-cleanse routine
- +Paraben-free and sulfate-free formulation
- −Contains added fragrance, disqualifying it for strict fragrance-free routines
- −Pre-lather texture is sticky and difficult to spread without water
- −May feel too stripping for dry or dehydrated skin types
- −No standout active ingredients beyond basic surfactants and humectants
- −Some users report difficulty rinsing completely, especially around the hairline
The full review.
About Numbuzin
Numbuzin bases its brand identity on a radical Korean skincare premise: choosing products is as simple as picking a number.
Texture
The texture is distinctive. Out of the tube, this cleanser is a thick, slightly sticky cream that does not glide easily on dry skin. It feels like you grabbed the wrong product. But once water hits it, the formula transforms—rapidly whipping into a dense, pillowy foam like shaving cream mixed with a cloud. A pea-sized amount lathers enough for your entire face, so the 120ml tube lasts longer than expected.
Scent
This formula contains added fragrance. It is the last ingredient on the INCI list, suggesting a low concentration. The scent is clean and subtle, fading quickly after rinsing. However, this disqualifies the product for anyone committed to fragrance-free skincare.
Pairs Well With
Use an oil cleanser first (Numbuzin makes the No. 1 Easy Peasy Cleansing Oil for this purpose), then let the foam cleanser remove whatever the oil step leaves behind.
Works for
The foam feels substantial but not heavy. It clings to pores and oily areas, dissolving sebum and surface debris efficiently. The T-zone gets the squeaky-clean feeling oily skin types want.
Not ideal for
This cleanser leans toward thorough cleansing. If your skin is dry, dehydrated, or reactive, this level of cleansing might leave you feeling tight.
Ingredient analysis.
Full INCI list
Water, Myristic Acid, PEG-8, Stearic Acid, Potassium Hydroxide, Glycerin, Lauric Acid, Palmitic Acid, Quillaja Saponaria Bark Extract, Butylene Glycol, Coco-Glucoside, Glyceryl Stearate SE, Polyquaternium-7, Arachidic Acid, Sodium Cocoyl Isethionate, Sodium Phytate, Oleic Acid, 1,2-Hexanediol, Citric Acid, Sodium Benzoate, Fragrance
Skin match.
The science.
The Science
The core cleansing mechanism in this formula relies on saponification — the reaction between fatty acids (myristic, stearic, lauric, palmitic) and potassium hydroxide to form potassium salts of those fatty acids, which function as soap. This is one of the oldest and most well-understood cleansing chemistries, and modern formulations like this one benefit from decades of optimization in how these fatty acid ratios affect foam quality, mildness, and rinsability.
Myristic acid is the primary surfactant here, listed second after water. Research published in the International Journal of Cosmetic Science has shown that potassium myristate produces a particularly rich, creamy foam with moderate cleansing strength — more thorough than stearic acid-based systems but less harsh than lauric acid-dominant ones. The inclusion of all four fatty acids in descending concentrations suggests an intentional balancing act: myristic for foam quality, stearic for creaminess and mildness, lauric for cleansing power, and palmitic for foam stability.
Sodium cocoyl isethionate (SCI) is the synthetic surfactant backup in this system. SCI has been extensively studied for its mildness profile — a 2005 study in the Journal of the American Academy of Dermatology found it to be one of the least irritating surfactants compared to sodium lauryl sulfate, making it a preferred choice in formulations targeting skin that needs effective cleansing without barrier disruption.
Quillaja saponaria bark extract provides naturally occurring saponins — triterpene glycosides that lower surface tension and create foam. While less studied in cosmetic contexts than synthetic surfactants, Quillaja saponins have been shown in pharmaceutical research to have mild antimicrobial and anti-inflammatory properties, adding a functional benefit beyond foam generation.
Glycerin at its listed concentration serves as the primary humectant counterbalance, helping to mitigate the moisture loss that any surfactant system inevitably causes. Its role here is supportive rather than therapeutic — maintaining skin hydration during the brief contact time rather than delivering lasting moisturization.
References
- Mild cleansing technology: the role of synthetic surfactants — Journal of the American Academy of Dermatology (2005)
Dermatologist Perspective
Dermatologists generally view fatty acid-based foam cleansers as a reasonable middle ground between harsh sulfate cleansers and ultra-gentle micellar waters. For patients with oily or combination skin who prefer the tactile satisfaction of a foaming cleanse, formulas like this one — built on saponified fatty acids with gentle co-surfactants — represent a lower-risk option than traditional soap bars or SLS-heavy foams. Board-certified dermatologists would note that the presence of fragrance makes this less suitable for patients with contact dermatitis or established fragrance sensitivity, and would likely recommend fragrance-free alternatives for anyone with a compromised skin barrier. As a second cleanser in a double-cleanse routine, this type of product can help manage excess sebum production and reduce comedonal acne when used consistently.
Where it fits in your routine.
Wet your hands and face first. Squeeze a pea-sized amount onto your palm, add a splash of water, and lather between your hands for ten seconds before applying to your face. Massage in gentle circular motions for thirty to sixty seconds, focusing on the T-zone and congestion-prone areas. Rinse thoroughly with lukewarm water; ensure you clear all residue from the hairline and jawline. Use morning and evening, or evening only if your skin is dry. For best results, use an oil-based cleanser in the PM to remove sunscreen and makeup before using this foam.
At $11 for 120ml, this cleanser is budget-friendly. The economics improve because each use requires very little product. One tube lasts three months with twice-daily use. The price-to-quality ratio is fair: you get a multi-surfactant system without paying for actives that wash down the drain. It is not a bargain-bin cheapout, but it does not charge a markup for K-beauty credentials. For an emerging brand with limited independent clinical validation, the modest pricing is appropriate and reflects its market position.
This cleanser is ideal for oily and combination skin types who love the tactile satisfaction of a rich foam but want to avoid sulfates. If you're looking for an affordable, no-nonsense second cleanser for a double-cleanse routine and your skin can handle light fragrance, this delivers reliable performance without complexity.
Skip this if you have dry, dehydrated, or sensitive skin — the multi-surfactant system works too well for skin that struggles to retain moisture. People seeking fragrance-free skincare should also look elsewhere, as this formula contains added fragrance despite its otherwise clean profile.
Product details.
Light clean fragrance — present but not overpowering
Standard plastic squeeze tube with a flip-cap lid. The simple, functional design matches Numbuzin's minimalist numbered branding. Finish non-greasyfast-absorbingmatte
The cream feels tacky before you add water. Once water hits, it whips into a dense foam almost immediately. A pea-sized amount covers the full face. Some users feel slight tightness after rinsing, but this usually stops within the first week as skin adjusts.
Use twice daily for 2-3 months; each application uses very little product.
12 months
All Year
The backstory.
Numbuzin's numbered product system was designed to simplify Korean skincare for consumers overwhelmed by the category's complexity. The No. 2 line focuses on clean, refreshed skin, and this cleansing foam was one of the brand's early releases that helped establish its reputation at Olive Young, Korea's dominant beauty retailer.
About Numbuzin
Emerging Brand (2–5 years)Numbuzin launched in 2019 via Korean startup Benow and won top honors at the 2022 Olive Young Awards. The brand uses a numbered product system and shows ingredient transparency, but lacks a long track record and independent clinical trials on its specific formulations.
Common myths.
Foam cleansers strip the skin and damage the skin barrier.
This formula uses a fatty acid surfactant base (myristic, stearic, lauric, palmitic acids saponified with potassium hydroxide). It is gentler than SLS-based foams, but the thick lather may still irritate very dry or compromised skin.
Natural surfactants like Quillaja bark extract are gentler than synthetic ones.
Plant saponins vary in irritation potential. In this formula, Quillaja extract works alongside gentle surfactants like sodium cocoyl isethionate to keep the system mild. Natural origin does not automatically make a whole product gentler.
FAQ.
Is the Numbuzin No. 2 cleanser good for sensitive skin?
This cleanser contains fragrance and PEG-8, which can irritate sensitive skin. Its fatty acid surfactant base is gentler than SLS-based foams, but the formula works best for normal, combination, or oily skin. Sensitive skin types should patch test first or use fragrance-free alternatives.
How do you use the Numbuzin No. 2 cleansing foam?
Apply a pea-sized drop to damp hands, add water, and lather before face application. Massage gently for 30-60 seconds, focusing on the T-zone if oily, then rinse thoroughly. This works best as the second step in a double-cleanse routine after an oil-based cleanser.
Does the Numbuzin No. 2 cleanser remove makeup?
It removes light makeup and sunscreen residue, but it does not remove heavy or waterproof makeup alone. Numbuzin recommends using it with their No. 1 Easy Peasy Cleansing Oil for a double-cleanse routine that removes full makeup.
Why does this cleanser feel sticky before adding water?
The cream base contains saponifiable fatty acids (myristic, stearic, lauric) that water hasn't activated yet. Adding water lets potassium hydroxide saponify these fats into soap to create the foam. This pre-lather stickiness is normal for this cleanser formulation.
Is the Numbuzin No. 2 cleanser sulfate-free?
Yes, this cleanser is sulfate-free. It uses saponified fatty acids, sodium cocoyl isethionate, and coco-glucoside instead of SLS or SLES. These ingredients are gentler alternatives to sulfate-based surfactants.
What the community says.
"Whipped cream-like texture that feels luxurious"
"Small amount creates abundant rich lather"
"Effectively removes excess oil and makeup residue"
"Affordable price point for a K-beauty cleanser"
"Can feel drying on certain skin types"
"Contains fragrance which may irritate sensitive skin"
"Sticky texture before water activation makes initial application awkward"
"Some users report difficulty rinsing completely"
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