Ingredient review
Hydrogenated Polydicyclopentadiene
INCI: Hydrogenated Polydicyclopentadiene
A synthetic polymer that helps makeup last longer and feel smooth, but offers no skincare benefits.
In plain English
Hydrogenated Polydicyclopentadiene is a man-made ingredient that forms a thin, flexible film on the skin. It's used in makeup to help products stay put, resist smudging, and create a silky, non-greasy feel. Think of it as a clear, invisible shield that helps your foundation or lipstick last through the day 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
Hydrogenated Polydicyclopentadiene 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 Polydicyclopentadiene.
- 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 hydrocarbon polymer produced by hydrogenating polydicyclopentadiene, a resin derived from petroleum. It is a clear, viscous liquid that dries to a flexible, non-tacky film.
How it works
When applied, the polymer molecules spread into a thin, even layer on the skin. As the solvent evaporates, they link together to form a flexible film that adheres to the skin's surface. This film helps lock in other ingredients, prevents makeup from transferring or fading, and gives a smooth, velvety finish.
Pros
Long-lasting wear
Helps makeup resist fading, smudging, and transferring throughout the day, so you need fewer touch-ups.
Smooth texture
Gives a silky, velvety feel to products, making them glide on easily and feel lightweight on the skin.
Cons and cautions
Synthetic origin
Derived from petroleum, which may be a concern for those seeking natural or sustainable beauty options.
No skincare benefit
It only improves product performance and does not hydrate, soothe, or protect the skin.
Best for
- Anyone looking for long-lasting makeup
- People with oily or combination skin who want a matte finish
Use caution if
- Those who prefer only natural or plant-based ingredients
- Individuals with very dry or dehydrated skin who may find film-formers uncomfortable
Usage tips
Safety summary
Hydrogenated Polydicyclopentadiene is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. However, it is a synthetic ingredient with no natural or biodegradable profile.
Research notes
Safety assessments by cosmetic ingredient review panels and regulatory bodies support its use. There is limited independent research on this specific polymer, but it is structurally similar to other well-studied hydrocarbon film-formers.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar hydrocarbon polymers and found them safe as used.
- Common uses
- Lipsticks, Foundations, Eye shadows, Long-wear makeup
- Environmental note
- As a petroleum-derived synthetic, it is not biodegradable. However, it is used in very small amounts per product.
Good to know
- This ingredient is often found in 'transfer-proof' or '24-hour wear' makeup formulas.
- It is considered safe by major cosmetic safety panels at typical use levels.
Common questions
What is Hydrogenated Polydicyclopentadiene in beauty products?
Hydrogenated Polydicyclopentadiene is a man-made ingredient that forms a thin, flexible film on the skin. It's used in makeup to help products stay put, resist smudging, and create a silky, non-greasy feel. Think of it as a clear, invisible shield that helps your foundation or lipstick last through the day without feeling heavy or sticky.
What does Hydrogenated Polydicyclopentadiene do in a beauty product?
When applied, the polymer molecules spread into a thin, even layer on the skin. As the solvent evaporates, they link together to form a flexible film that adheres to the skin's surface. This film helps lock in other ingredients, prevents makeup from transferring or fading, and gives a smooth, velvety finish.
Is Hydrogenated Polydicyclopentadiene safe for most people?
Hydrogenated Polydicyclopentadiene is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. However, it is a synthetic ingredient with no natural or biodegradable profile.
Who should be careful with Hydrogenated Polydicyclopentadiene?
Those who prefer only natural or plant-based ingredients Individuals with very dry or dehydrated skin 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.