Ingredient review
Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer
INCI: BIS-LAURYL LACTATE IPDI/PEG-2 SOYAMINE COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This is a man-made ingredient that forms a thin, flexible film on your skin. It helps makeup or sunscreen stay in place longer and resist water or sweat. Think of it like a gentle, invisible glue that holds the product on your skin without feeling heavy or sticky.
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
Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer 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 Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer.
- 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
A copolymer synthesized from lauryl lactate, isophorone diisocyanate (IPDI), and PEG-2 soyamine. It is a film-forming agent designed to improve the durability and water resistance of cosmetic formulations.
How it works
When applied, the copolymer molecules link together to create a continuous, flexible film on the skin's surface. This film acts as a barrier that slows down the removal of other ingredients by water, sweat, or friction, thereby extending wear time.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective even when you sweat or get wet, reducing the need for frequent reapplication.
Lightweight feel
Forms a thin, flexible film that doesn't feel heavy or sticky, making it comfortable for daily wear.
Cons and cautions
No active benefit
This ingredient is purely functional—it doesn't hydrate, soothe, or treat the skin in any way.
Potential tightness
On very dry or sensitive skin, the film can sometimes feel slightly tight or drying, especially if used in high concentrations.
Best for
- People who want long-lasting, water-resistant makeup or sunscreen
- Those with normal to oily skin who prefer a matte finish
Use caution if
- Individuals with very dry or compromised skin barriers who may find film-formers uncomfortable
Usage tips
Safety summary
Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. However, as with any film-former, individuals with very sensitive or compromised skin may experience mild tightness or dryness.
Research notes
There is limited published research specifically on this copolymer, but it belongs to a well-studied class of film-forming polymers used in cosmetics. Safety assessments by industry panels have found it acceptable for use in leave-on and rinse-off products at concentrations up to 5%.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. It is considered safe at typical concentrations used in leave-on and rinse-off products.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations
- Environmental note
- As a synthetic polymer, its biodegradability is limited. It may persist in water systems, though concentrations from cosmetic use are very low.
Good to know
- This polymer is often used alongside other film-formers to create a more durable barrier.
- It is not absorbed into the skin—it stays on the surface and is removed with cleansing.
Common questions
What is Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer in beauty products?
This is a man-made ingredient that forms a thin, flexible film on your skin. It helps makeup or sunscreen stay in place longer and resist water or sweat. Think of it like a gentle, invisible glue that holds the product on your skin without feeling heavy or sticky.
What does Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer do in a beauty product?
When applied, the copolymer molecules link together to create a continuous, flexible film on the skin's surface. This film acts as a barrier that slows down the removal of other ingredients by water, sweat, or friction, thereby extending wear time.
Is Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer safe for most people?
Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. However, as with any film-former, individuals with very sensitive or compromised skin may experience mild tightness or dryness.
Who should be careful with Bis-Lauryl Lactate IPDI/PEG-2 Soyamine Copolymer?
Individuals with very dry or compromised skin barriers who may find film-formers uncomfortable
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.