Ingredient review
Hydrogenated Dicyclopentadiene/Isopentene/Isoprene Copolymer
INCI: HYDROGENATED DICYCLOPENTADIENE/ISOPENTENE/ISOPRENE COPOLYMER
A synthetic polymer that helps makeup and skincare stay put longer by forming a flexible, water-resistant film on the skin.
In plain English
This is a man-made ingredient that creates a thin, invisible film on your skin. Think of it like a gentle, flexible shield that helps your foundation or sunscreen stay in place longer, even if you sweat or get a little wet. It doesn't clog pores or cause irritation for most people, but it's not a moisturizer or active treatment 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
Hydrogenated Dicyclopentadiene/Isopentene/Isoprene 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 Hydrogenated Dicyclopentadiene/Isopentene/Isoprene 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 (a large molecule made from smaller repeating units) that has been hydrogenated to make it more stable and less reactive. It is derived from petroleum-based feedstocks and is commonly used in cosmetics to improve product performance.
How it works
When applied to the skin, the copolymer forms a thin, flexible film after the solvent (like water or alcohol) evaporates. This film helps lock in other ingredients, reduces transfer of makeup to clothes, and improves water resistance. It also helps control the viscosity (thickness) of the product for a smooth application.
Pros
Long-lasting wear
Helps makeup and sunscreen stay on longer, reducing the need for touch-ups throughout the day.
Water resistance
Creates a barrier that resists sweat and moisture, ideal for humid conditions or active lifestyles.
Cons and cautions
Synthetic origin
Derived from petroleum, which may be a concern for those seeking natural or sustainable beauty products.
Potential tackiness
In high concentrations, it can leave a slightly sticky or heavy feel on the skin, especially in humid weather.
Best for
- Anyone wanting long-lasting makeup
- People who need water-resistant sunscreens or mascaras
- Those with normal to oily skin who prefer matte finishes
Use caution if
- People who strictly avoid synthetic ingredients
- Those with very sensitive skin who react to film-formers (rare)
Usage tips
Safety summary
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic potential. No significant safety concerns reported in peer-reviewed literature or regulatory reviews.
Research notes
Limited specific studies on this exact copolymer, but film-forming polymers as a class are well-studied and considered safe. The hydrogenation process reduces reactivity, making it even less likely to cause irritation.
Common label clues
- Typical concentration
- 1% to 10% depending on formula
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. No known restrictions at typical use levels.
- Common uses
- Long-wear foundations, Waterproof mascara, Lip products, Sunscreens, Eye liners
- Environmental note
- As a synthetic polymer, it is not biodegradable and may persist in the environment. Some brands are moving toward bio-based alternatives.
Good to know
- This ingredient is often listed near the end of ingredient lists because it's used in small amounts.
- It is considered safe by major regulatory bodies when used as intended in cosmetics.
Common questions
What is Hydrogenated Dicyclopentadiene/Isopentene/Isoprene Copolymer in beauty products?
This is a man-made ingredient that creates a thin, invisible film on your skin. Think of it like a gentle, flexible shield that helps your foundation or sunscreen stay in place longer, even if you sweat or get a little wet. It doesn't clog pores or cause irritation for most people, but it's not a moisturizer or active treatment ingredient.
What does Hydrogenated Dicyclopentadiene/Isopentene/Isoprene Copolymer do in a beauty product?
When applied to the skin, the copolymer forms a thin, flexible film after the solvent (like water or alcohol) evaporates. This film helps lock in other ingredients, reduces transfer of makeup to clothes, and improves water resistance. It also helps control the viscosity (thickness) of the product for a smooth application.
Is Hydrogenated Dicyclopentadiene/Isopentene/Isoprene Copolymer safe for most people?
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic potential. No significant safety concerns reported in peer-reviewed literature or regulatory reviews.
Who should be careful with Hydrogenated Dicyclopentadiene/Isopentene/Isoprene Copolymer?
People who strictly avoid synthetic ingredients Those with very sensitive skin who react to film-formers (rare)
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.