S2 Salicylic Acid 2% Liquid
S2 Salicylic Acid 2% Liquid
Product Description
Product overview
A powerful yet gentle BHA exfoliant combining 2% Salicylic Acid with Betaine Salicylate and 2% Niacinamide to unclog pores, fight acne, reduce blackheads, and improve overall skin clarity without over-drying. Enriched with soothing botanical extracts for a balanced, radiant complexion.
Dual BHA Complex
Combines pure Salicylic Acid with gentle Betaine Salicylate for effective yet non-irritating exfoliation deep within pores.
Texture & feel
SENSORYDual BHA Complex
Combines pure Salicylic Acid with gentle Betaine Salicylate for effective yet non-irritating exfoliation deep within pores.
Brightening Niacinamide
2% Niacinamide helps fade post-acne marks, regulate sebum production, and strengthen the skin barrier.
Botanical Soothing Complex
Rose, Lavender, Green Tea, and Mugwort extracts calm inflammation and reduce redness associated with breakouts.
Aloe Vera Base
Formulated with organic Aloe Vera instead of water for added hydration and soothing benefits.
Safety & compatibility
SAFE2% salicylic acid is generally considered safe by ACOG, but consult your doctor before use during pregnancy. Avoid high-dose peels.
Topical 2% salicylic acid is unlikely to be absorbed into breastmilk. Avoid applying on areas that contact baby's skin.
Salicylic acid helps remove dead skin and oils that yeast feeds on. Formula is free from problematic oils and fatty acids.
Rating 1/5 - Contains no pore-clogging oils or heavy emollients. Safe for acne-prone skin.
Avoid using with retinoids in the same routine. Alternate nights to prevent over-exfoliation and irritation.
While BHA doesn't increase photosensitivity like AHAs, always use SPF 30+ daily for best results and skin protection.
Ingredient breakdown
INGREDIENTSSalicylic Acid 2%Proven
A beta-hydroxy acid (BHA) that is oil-soluble, allowing it to penetrate deep into pores to dissolve sebum, dead skin cells, and debris. FDA-approved for OTC acne treatment.
- Mechanism: Breaks down keratin plugs and dissolves intracellular lipid matrix
- Efficacy: Studies show 0.5-2% concentrations effective for mild-moderate acne
- Anti-inflammatory: Related to aspirin; provides soothing benefits
Betaine Salicylate PresentGentle Alternative
A combination of salicylic acid and betaine that provides gentler BHA action. Popular in K-beauty due to Korean regulations limiting pure salicylic acid. Approximately half as potent as pure salicylic acid.
- Benefit: Exfoliates while providing moisturizing betaine benefits
- pH Range: Most effective at pH 3.8-4.2
- Sensitivity: Better tolerated by sensitive skin types
Niacinamide 2%Proven
Vitamin B3 derivative with multiple proven benefits including oil control, pore minimization, barrier strengthening, and brightening. Works synergistically with BHA.
- Oil Control: Reduces sebum production by up to 25% at 2%+ concentrations
- Brightening: Inhibits melanosome transfer to reduce hyperpigmentation
- Barrier Support: Increases ceramide and fatty acid synthesis
Aloe Barbadensis Leaf Extract BaseSoothing
Used as the primary base instead of plain water. Contains vitamins, amino acids, and polysaccharides that hydrate and calm the skin while reducing irritation from actives.
- Anti-inflammatory: Contains acemannan and other compounds that reduce redness
- Wound Healing: Accelerates skin repair and recovery
- Hydration: Forms a protective film that locks in moisture
12 ingredients
Aloe Barbadensis Leaf Extract*, Propanediol, Salicylic Acid, Betaine Salicylate, Niacinamide, 1,2-Hexanediol, Rosa Damascena Extract*, Lavandula Angustifolia (Lavender) Flower Extract*, Camellia Sinensis Leaf Extract*, Melissa Officinalis Leaf Extract*, Artemisia Vulgaris Extract*, Hydroxyethylcellulose
*Natural Origin Ingredients (N.O.I.P 85%)
Where it fits in your routine
ROUTINEBest used in PM routine. Start with 2-3x per week and gradually increase. Wait 20-30 minutes before applying other products for maximum efficacy. Always follow with moisturizer.
How to use
HOW TO USECleanse Face
Start with clean, dry skin. Use a gentle cleanser and pat face dry completely.
Apply Product
Dispense product onto a cotton pad and sweep across face following skin texture, or apply a small amount directly with palms and pat in.
Wait Time
Allow 20-30 minutes for the BHA to work at optimal pH before applying other products. This maximizes exfoliation benefits.
Follow Up
Apply hydrating serum and moisturizer. In the morning, always finish with SPF 30+ sunscreen.
Who is it for?
WHOPerfect for you if:
- You struggle with blackheads and clogged pores
- You have oily or combination skin
- You experience hormonal or mild-moderate acne
- You want to reduce sebaceous filaments
- You need a gentle introduction to BHAs
- You prefer fragrance-free products
- You want value for money (large 120ml size)
Consider alternatives if:
- You have very dry or dehydrated skin
- You're allergic to aspirin (salicylic acid related)
- You're using prescription retinoids daily
- You have active eczema or compromised skin barrier
- You're pregnant and haven't consulted your doctor
- You need a stronger professional-grade peel
Skin type compatibility
SKIN TYPESBHA is oil-soluble, making it perfect for oily skin. Penetrates through sebum to unclog pores and regulate oil production.
Perfect for T-zone focus. Apply to oily areas while using lighter application on drier cheeks.
Antibacterial and anti-inflammatory properties target acne bacteria. Non-comedogenic formula won't clog pores.
Gentler than pure salicylic acid products due to betaine salicylate and aloe base. Start slowly and patch test first.
Use sparingly 1-2x weekly. Always follow with rich moisturizer. May cause dryness if overused.
Gentle exfoliation improves texture and product absorption. Niacinamide provides anti-aging benefits.
Results timeline
WEEK 8+Initial Adjustment
Skin may experience purging as BHA brings hidden congestion to the surface. This is normal and temporary. Slight tingling upon application is expected.
60% may experience purgingVisible Improvement
Pores appear cleaner and smaller. Blackheads begin to reduce. Skin texture becomes smoother and more refined. Blemishes heal faster.
75% notice clearer poresSignificant Results
Noticeable reduction in breakouts and blackheads. Skin tone more even thanks to niacinamide. Oil production balanced. Post-acne marks fading.
85% report fewer breakoutsMaintenance Phase
Consistent clear skin with continued use. Pores remain unclogged. Some users reduce frequency to 2-3x weekly for maintenance.
90% overall satisfactionRatings by platform
8K+ REVIEWSPros & cons
BALANCEDPraised
- Excellent value - large 120ml size at affordable price
- Non-sticky, lightweight texture absorbs quickly
- Effectively clears blackheads and prevents breakouts
- Fragrance-free and gentle formula
- Multi-functional with niacinamide benefits
- Clean ingredient list with 85% natural origin
- Cruelty-free and vegan
- Suitable for sensitive acne-prone skin
Criticized
- May cause purging initially (normal but frustrating)
- Slower results compared to stronger formulas
- Plastic pump bottle not most eco-friendly
- Can be drying if overused without moisturizer
- Not effective for severe cystic acne (need prescription)
- Watery texture may feel less substantial
Budget-friendly alternatives (dupes)
DUPESSame 2% salicylic acid concentration. Simpler formula without niacinamide or botanical extracts. Smaller 30ml size. More basic but equally effective for pore clearing.
Uses 4% Betaine Salicylate (gentler than pure SA) plus niacinamide. Willow bark water base. Slightly thicker gel texture. Popular K-beauty alternative with similar results.
2% salicylic acid in convenient pad form. Contains menthol which can be irritating. No additional beneficial ingredients. More drying but very affordable option.
Comparison with competitors
SIDE-BY-SIDECos De BAHA S2
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Refrigeration not required but can extend freshness.
Plastic bottle with pump dispenser for hygienic, measured dispensing.
Yes - 120ml is above carry-on limit (100ml), but can be checked or decanted into smaller container.
Frequently asked questions
FAQThe American College of Obstetricians and Gynecologists (ACOG) considers topical products with 2% or less salicylic acid to be safe during pregnancy. However, we recommend consulting your healthcare provider before use. For breastfeeding, topical 2% salicylic acid is considered safe as it's unlikely to be absorbed into breastmilk in significant amounts. Avoid applying to areas that may come into contact with baby's skin or mouth.
Yes, this product is considered fungal acne safe. Salicylic acid helps remove the dead skin cells and oils that yeast feeds on, making the environment less hospitable for malassezia. The formula is free from problematic ingredients like fatty acids, oils, and esters that can feed fungal acne. The aloe vera base and botanical extracts used are safe for fungal-acne-prone skin.
Caution is advised when combining actives. Do NOT use with other BHAs or AHAs in the same routine to avoid over-exfoliation. For retinol: use on alternate nights (BHA one night, retinol the next). For Vitamin C: use Vitamin C in the morning and BHA at night, or wait 30 minutes between applications. The niacinamide in this formula works synergistically with the BHA. When in doubt, introduce one active at a time and monitor your skin's response.
This product is best suited for oily, combination, and acne-prone skin types. It's excellent for those struggling with blackheads, enlarged pores, sebaceous filaments, and mild-to-moderate acne. The addition of betaine salicylate and soothing botanicals makes it gentler than many BHA products, so it can also work for sensitive skin when used carefully. Those with very dry skin should use sparingly and always follow with moisturizer.
Most users notice initial improvements in skin texture within 2-4 weeks. Blackheads and clogged pores typically show improvement by week 4. Significant results including clearer skin, reduced breakouts, and more refined pores are usually visible by 6-8 weeks of consistent use. Note: Some users may experience purging (temporary increase in breakouts) during the first 2-4 weeks as the BHA brings hidden congestion to the surface. This is normal and should subside.
Apply after cleansing and toning (if you use toner). The order is: 1) Cleanser, 2) Toner (optional), 3) BHA Liquid (this product), 4) Wait 20-30 minutes for optimal efficacy, 5) Serum, 6) Moisturizer, 7) Sunscreen (AM only). Best used in your PM routine. Start with 2-3 times per week and gradually increase to daily use if your skin tolerates it well.
No, this product is non-comedogenic with a rating of 1/5. It contains no pore-clogging oils, heavy emollients, or problematic ingredients. In fact, the salicylic acid actively works to unclog pores by dissolving the sebum and dead skin cells that cause blackheads and breakouts. The formula is specifically designed for acne-prone skin and has been used safely by thousands of users with congested skin.
The product has a PAO (Period After Opening) of 12 months. This means it should be used within 12 months of first opening. Store in a cool, dry place away from direct sunlight to maintain efficacy. The 120ml size typically lasts 3-4 months with regular use (daily application), so you should easily use the product within its shelf life. If the product changes color, consistency, or develops an unusual smell, discontinue use.
Verdict: Cos De BAHA S2 Salicylic Acid 2% Liquid delivers impressive value with its generous 120ml size, effective dual-BHA formula, and thoughtful addition of niacinamide and botanical extracts. It successfully balances potency with gentleness, making it an excellent choice for BHA beginners and experienced users alike. While it may not produce the fastest results compared to stronger formulas, its consistent long-term benefits, clean ingredient list, and budget-friendly price point make it a standout option in the crowded BHA market. Perfect for oily and acne-prone skin seeking clearer pores without irritation.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 0 |
Aloe Barbadensis Leaf Extract
Emollient, Humectant, Skin Conditioning
|
Hydrating
Redness
Irritation
|
|
| 1 |
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
|
|
|
| 4 |
Salicylic Acid
Skin Conditioning, Masking, Fragrance, Hair Conditioning, Antidandruff Agent, Antiacne Agent, Denaturant, Preservative, Exfoliant, Keratolytic, Corn/Callus/Wart Remover
|
Pores
|
|
| 1 |
Betaine Salicylate
Antimicrobial Agent, Exfoliant, Keratolytic
|
|
|
| 1 |
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
|
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
|






