Ingredient review
Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate
INCI: HYDROGENATED CASTOR OIL/SEBACIC ACID COPOLYMER CAPRATE/CAPRYLATE
A gentle film-forming ingredient that helps products stay put without feeling heavy or sticky.
In plain English
This ingredient is a type of polymer made from castor oil and sebacic acid (a natural substance from castor oil). It forms a thin, flexible film on your skin or hair, helping other ingredients stay in place longer. Think of it like a gentle, invisible shield that helps your makeup last or your sunscreen stay effective. It's also used to improve the feel of a product, making it smoother and less greasy.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate 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 Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate.
- 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 semi-synthetic copolymer created by reacting hydrogenated castor oil with sebacic acid, then capping with caprate/caprylate fatty acids. It appears as a waxy solid and is used as a film-former and texture enhancer.
How it works
When applied, it spreads into a thin, even film that dries down to a flexible, water-resistant layer. This film helps lock in other ingredients (like sunscreen filters or pigments) and reduces transfer or smudging. It also gives a smooth, silky feel to the product.
Pros
Long-lasting wear
Forms a flexible film that helps makeup and sunscreen stay put for hours, reducing the need for touch-ups.
Pleasant texture
Gives products a smooth, silky feel without greasiness, making application more comfortable.
Cons and cautions
Removal challenge
Because it's water-resistant, you may need an oil-based cleanser or double cleanse to fully remove it, which can be inconvenient.
Potential tightness
On very dry or compromised skin, the film can feel slightly tight or uncomfortable, especially if used in high concentrations.
Best for
- Anyone wanting longer-lasting makeup or sunscreen
- People with normal to oily skin who prefer a matte finish
Use caution if
- Those with extremely dry or dehydrated skin may find it slightly drying
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in scientific literature.
Research notes
Limited peer-reviewed studies specifically on this copolymer, but related castor oil derivatives and sebacic acid polymers have a good safety profile. Industry data supports its use as a gentle film-former.
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 restrictions noted.
- Common uses
- Long-wear makeup, Sunscreens, Moisturizers, Lip products
- Environmental note
- Castor oil is a renewable resource, and sebacic acid is also plant-derived. The copolymer is not known to be bioaccumulative, but as with all film-formers, proper removal before washing is recommended to minimize environmental impact.
Good to know
- This ingredient is often used in 'transfer-proof' or 'long-wear' makeup formulas.
- It is derived from castor oil, a renewable plant source, making it a more sustainable choice compared to some petroleum-based film-formers.
Common questions
What is Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate in beauty products?
This ingredient is a type of polymer made from castor oil and sebacic acid (a natural substance from castor oil). It forms a thin, flexible film on your skin or hair, helping other ingredients stay in place longer. Think of it like a gentle, invisible shield that helps your makeup last or your sunscreen stay effective. It's also used to improve the feel of a product, making it smoother and less greasy.
What does Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate do in a beauty product?
When applied, it spreads into a thin, even film that dries down to a flexible, water-resistant layer. This film helps lock in other ingredients (like sunscreen filters or pigments) and reduces transfer or smudging. It also gives a smooth, silky feel to the product.
Is Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate safe for most people?
Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in scientific literature.
Who should be careful with Hydrogenated Castor Oil/Sebacic Acid Copolymer Caprate/Caprylate?
Those with extremely dry or dehydrated skin may find it slightly drying
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.