Ingredient review
Poloxamer 402
INCI: POLOXAMER 402
Poloxamer 402 is a gentle synthetic ingredient that helps cleansers and makeup removers work effectively without stripping the skin.
In plain English
Poloxamer 402 is a man-made ingredient that acts like a bridge between oil and water. In skincare, it helps cleansers and makeup removers lift dirt, oil, and makeup from your skin so they can be rinsed away easily. It is known for being very gentle and less likely to cause irritation compared to some other cleansing ingredients.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Poloxamer 402 is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Poloxamer 402.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Poloxamer 402 is a synthetic block copolymer made from ethylene oxide and propylene oxide. It belongs to the poloxamer family, which are non-ionic surfactants widely used in cosmetics and personal care products for their ability to emulsify and cleanse.
How it works
Poloxamer 402 works by reducing the surface tension between oil and water. When you use a product containing it, the molecules surround oil and dirt particles, allowing them to be suspended in water and rinsed away. This makes it effective for removing makeup and excess sebum without harsh scrubbing.
Pros
Very gentle on skin
Poloxamer 402 is known for low irritation potential, making it suitable for sensitive skin types when used in appropriate concentrations.
Effective at removing oil and makeup
It helps lift and suspend oils and makeup, allowing for thorough cleansing without excessive rubbing.
Cons and cautions
Synthetic origin
As a petrochemical-derived ingredient, it may not be preferred by those seeking natural or plant-based alternatives.
Potential for drying in high amounts
In leave-on products or very high concentrations, it can strip some moisture, so it's best used in rinse-off formulas.
Best for
- People with normal to combination skin looking for a gentle cleanser
- Those who prefer synthetic, non-soap cleansers
Use caution if
- Individuals with very dry or compromised skin barriers may want to pair with moisturizing ingredients
- Those who strictly avoid synthetic ingredients
Usage tips
Safety summary
Poloxamer 402 is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and regulatory bodies like the Cosmetic Ingredient Review (CIR) have deemed it safe for use in rinse-off and leave-on products.
Research notes
Studies on poloxamers indicate they are well-tolerated on skin and eyes. Research supports their use as gentle surfactants and emulsifiers, with no significant safety concerns at cosmetic levels.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU, and many other regions. Generally recognized as safe when used as directed.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers
- Environmental note
- Poloxamer 402 is biodegradable and not expected to bioaccumulate, making it relatively environmentally friendly compared to some other synthetic surfactants.
Good to know
- Poloxamer 402 is part of a family of ingredients often used in contact lens solutions due to their gentle nature
- It is considered biodegradable and safe for aquatic life at typical use levels
Common questions
What is Poloxamer 402 in beauty products?
Poloxamer 402 is a man-made ingredient that acts like a bridge between oil and water. In skincare, it helps cleansers and makeup removers lift dirt, oil, and makeup from your skin so they can be rinsed away easily. It is known for being very gentle and less likely to cause irritation compared to some other cleansing ingredients.
What does Poloxamer 402 do in a beauty product?
Poloxamer 402 works by reducing the surface tension between oil and water. When you use a product containing it, the molecules surround oil and dirt particles, allowing them to be suspended in water and rinsed away. This makes it effective for removing makeup and excess sebum without harsh scrubbing.
Is Poloxamer 402 safe for most people?
Poloxamer 402 is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and regulatory bodies like the Cosmetic Ingredient Review (CIR) have deemed it safe for use in rinse-off and leave-on products.
Who should be careful with Poloxamer 402?
Individuals with very dry or compromised skin barriers may want to pair with moisturizing ingredients Those who strictly avoid synthetic ingredients
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.