Ingredient review
Bis-Stearyl IPDI/PEG-795 Copolymer
INCI: Bis-Stearyl IPDI/PEG-795 Copolymer
A synthetic film-former that helps products stay put, but offers no active skincare benefit.
In plain English
This is a man-made polymer that creates a thin, flexible film on your skin or hair. Think of it like a clear, invisible wrap that helps makeup or sunscreen stay in place longer and resist water or sweat. It doesn't moisturize or treat your skin—it's purely a performance ingredient.
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-Stearyl IPDI/PEG-795 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-Stearyl IPDI/PEG-795 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 stearyl alcohol, isophorone diisocyanate (IPDI), and polyethylene glycol (PEG-795). It belongs to a class of ingredients called film-formers, which are designed to form a continuous layer on the skin or hair surface.
How it works
When applied, the copolymer molecules link together as the solvent evaporates, forming a uniform, flexible film. This film helps other ingredients (like pigments or UV filters) adhere better, resist rub-off, and maintain their effect for longer. It also adds a slight thickening effect to the product texture.
Pros
Boosts wear time
Creates a durable film that helps makeup and sunscreen resist fading, smudging, and water exposure throughout the day.
Flexible feel
Unlike some older film-formers, this copolymer forms a flexible film that moves with your skin, reducing the risk of cracking or flaking.
Cons and cautions
No skincare benefit
This ingredient is purely functional—it doesn't moisturize, soothe, or improve skin health. It's only there to improve product performance.
May feel heavy on oily skin
The film it creates can sometimes feel slightly tacky or heavy, especially if you have naturally oily skin or use multiple layers of product.
Best for
- Anyone looking for long-wearing, water-resistant makeup or sunscreen
- People who live in humid climates or sweat easily
Use caution if
- Those who prefer minimal, lightweight formulas with only active ingredients
Usage tips
Safety summary
Bis-Stearyl IPDI/PEG-795 Copolymer is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as with any ingredient, individual sensitivity is possible.
Research notes
There is limited published research specifically on this copolymer. Its safety is supported by analogy to similar film-forming polymers and its history of use in cosmetics. Regulatory assessments from bodies like the EU SCCS have not raised specific concerns.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and other major markets. The EU CosIng database lists it as a film-forming agent with no specific restrictions at typical use levels.
- Common uses
- Sun protection, Waterproof makeup, Long-wear foundations, Hair styling products
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. Its environmental impact is similar to other film-forming polymers used in cosmetics.
Good to know
- This ingredient is often found in 'long-wear' or 'waterproof' labeled products.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Bis-Stearyl IPDI/PEG-795 Copolymer in beauty products?
This is a man-made polymer that creates a thin, flexible film on your skin or hair. Think of it like a clear, invisible wrap that helps makeup or sunscreen stay in place longer and resist water or sweat. It doesn't moisturize or treat your skin—it's purely a performance ingredient.
What does Bis-Stearyl IPDI/PEG-795 Copolymer do in a beauty product?
When applied, the copolymer molecules link together as the solvent evaporates, forming a uniform, flexible film. This film helps other ingredients (like pigments or UV filters) adhere better, resist rub-off, and maintain their effect for longer. It also adds a slight thickening effect to the product texture.
Is Bis-Stearyl IPDI/PEG-795 Copolymer safe for most people?
Bis-Stearyl IPDI/PEG-795 Copolymer is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as with any ingredient, individual sensitivity is possible.
Who should be careful with Bis-Stearyl IPDI/PEG-795 Copolymer?
Those who prefer minimal, lightweight formulas with only active 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.