Ingredient review
Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer
INCI: Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer
A synthetic film-former that helps makeup and sunscreen stay put without feeling heavy, but offers no active skincare benefit.
In plain English
This ingredient is a man-made polymer that combines silicone and urethane chemistry. When applied to skin or hair, it dries down into a thin, flexible, water-resistant film. Think of it like a clear, breathable raincoat for your makeup or sunscreen — it helps them last longer and resist sweat or humidity. It's not an active skincare ingredient, so it won't hydrate, exfoliate, or treat skin concerns on its own.
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
Hydroxypropyltrisiloxyl IPDI/PEG-14 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 Hydroxypropyltrisiloxyl IPDI/PEG-14 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 created by reacting hydroxypropyltrisiloxane (a silicone derivative) with isophorone diisocyanate (IPDI) and PEG-14. The result is a large molecule that forms a film when the solvent (usually water or alcohol) evaporates.
How it works
After application, the solvent evaporates, leaving behind a continuous, flexible film on the skin or hair surface. This film physically blocks water and oil from disturbing the underlying product, improving wear time and water resistance. The silicone portion gives a smooth, silky feel, while the urethane part adds durability and flexibility so the film doesn't crack or feel stiff.
Pros
Boosts wear time
Forms a protective film that helps makeup and sunscreen last longer, even in humid or sweaty conditions.
Comfortable feel
Unlike some older film-formers, this one stays flexible and doesn't leave a stiff or tight sensation on skin.
Cons and cautions
No skincare benefit
This is purely a performance ingredient — it won't hydrate, soothe, or treat any skin concerns.
Requires thorough removal
The water-resistant film can trap dirt and oil, so a dedicated oil-based or micellar cleanser is often needed to fully remove it.
Best for
- Anyone wanting long-wearing makeup or water-resistant sunscreen
- People with normal to oily skin who want a matte, stay-put finish
Use caution if
- Those who prefer minimal, water-only cleansing routines (may require double cleansing)
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns have been raised by regulatory bodies.
Research notes
Limited independent studies on this specific polymer. Safety is inferred from its chemical class (silicone urethane copolymers) and long history of use in cosmetics. No published evidence of systemic absorption or toxicity.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific concentration restrictions are common.
- Common uses
- Long-wear foundations, Waterproof sunscreens, Hair styling products, Eye makeup
- Environmental note
- As a synthetic silicone-based polymer, its biodegradability is low. It may accumulate in the environment, though current data is limited.
Good to know
- This ingredient is often found in 'transfer-proof' or '24-hour wear' makeup formulas.
- It is not a silicone oil (like dimethicone) but a polymer that contains silicone segments.
Common questions
What is Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer in beauty products?
This ingredient is a man-made polymer that combines silicone and urethane chemistry. When applied to skin or hair, it dries down into a thin, flexible, water-resistant film. Think of it like a clear, breathable raincoat for your makeup or sunscreen — it helps them last longer and resist sweat or humidity. It's not an active skincare ingredient, so it won't hydrate, exfoliate, or treat skin concerns on its own.
What does Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer do in a beauty product?
After application, the solvent evaporates, leaving behind a continuous, flexible film on the skin or hair surface. This film physically blocks water and oil from disturbing the underlying product, improving wear time and water resistance. The silicone portion gives a smooth, silky feel, while the urethane part adds durability and flexibility so the film doesn't crack or feel stiff.
Is Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer safe for most people?
Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with Hydroxypropyltrisiloxyl IPDI/PEG-14 Copolymer?
Those who prefer minimal, water-only cleansing routines (may require double cleansing)
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.