Ingredient review
Bis-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI Copolymer
INCI: BIS-HYDROXYETHOXYPROPYL DIMETHICONE/PEG-2 SOYAMINE/IPDI COPOLYMER
A synthetic silicone polymer that helps makeup and sunscreen stay put longer, especially in water or sweat.
In plain English
This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin. It's often added to sunscreens and long-wear makeup to make them more water-resistant and smudge-proof. Think of it like a gentle, invisible shield that helps your product stay in place 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-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI 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-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI 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 synthetic copolymer made from silicone (dimethicone), a soy-derived amine, and isophorone diisocyanate (IPDI). It is designed to create a flexible, water-resistant film on the skin or hair.
How it works
When applied, the molecules link together to form a thin, breathable film. This film physically blocks water and sweat from washing away the product, while also helping pigments and active ingredients stay evenly distributed on the skin.
Pros
Boosts water resistance
Helps sunscreen and makeup stay effective even when you sweat or go swimming, so you don't have to reapply as often.
Lightweight feel
Unlike some older film formers, this polymer creates a flexible film that doesn't feel stiff or mask-like on the skin.
Cons and cautions
Synthetic origin
Made in a lab from silicone and other chemicals, which may not align with natural or minimalist skincare preferences.
Potential tackiness
In high concentrations or poorly formulated products, it can leave a slightly sticky or draggy feel on the skin.
Best for
- Anyone wanting longer-lasting sunscreen or makeup
- People who swim, sweat, or live in humid climates
Use caution if
- Those who prefer completely silicone-free or all-natural products
Usage tips
Safety summary
Considered safe for topical use in cosmetics at typical concentrations. The soy-derived component is highly processed and unlikely to cause allergic reactions. As with any synthetic polymer, avoid inhalation of loose powder forms.
Research notes
Limited peer-reviewed studies specifically on this copolymer, but it is structurally similar to other well-studied silicone film formers. Safety assessments by industry panels (e.g., CIR) support its use in rinse-off and leave-on products.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The EU CosIng database lists it as a film-forming agent with no specific restrictions.
- Common uses
- Sunscreens, Long-wear foundations, Waterproof mascaras, Lip products
- Environmental note
- As a silicone-based polymer, it may not be biodegradable. However, it is used in low concentrations and is not known to accumulate in the environment significantly.
Good to know
- This polymer is often combined with other silicones to improve spreadability and texture.
- It is considered safe for use in cosmetics by major regulatory bodies when used as intended.
Common questions
What is Bis-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI Copolymer in beauty products?
This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin. It's often added to sunscreens and long-wear makeup to make them more water-resistant and smudge-proof. Think of it like a gentle, invisible shield that helps your product stay in place without feeling heavy or sticky.
What does Bis-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI Copolymer do in a beauty product?
When applied, the molecules link together to form a thin, breathable film. This film physically blocks water and sweat from washing away the product, while also helping pigments and active ingredients stay evenly distributed on the skin.
Is Bis-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI Copolymer safe for most people?
Considered safe for topical use in cosmetics at typical concentrations. The soy-derived component is highly processed and unlikely to cause allergic reactions. As with any synthetic polymer, avoid inhalation of loose powder forms.
Who should be careful with Bis-Hydroxyethoxypropyl Dimethicone/PEG-2 Soyamine/IPDI Copolymer?
Those who prefer completely silicone-free or all-natural products
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.