Ingredient review
Bis-Hydroxylauryl Dimethicone/IPDI Copolymer
INCI: BIS-HYDROXYLAURYL DIMETHICONE/IPDI COPOLYMER
A synthetic silicone polymer that helps makeup and sunscreen stay put longer without feeling heavy.
In plain English
This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin or hair. It helps products like foundation, mascara, and sunscreen resist water, sweat, and smudging, so they last longer. It also gives a smooth, silky feel without being 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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Bis-Hydroxylauryl Dimethicone/IPDI 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-Hydroxylauryl Dimethicone/IPDI 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 silicone (dimethicone) and isophorone diisocyanate (IPDI), designed to create a durable yet flexible film on the skin or hair.
How it works
When applied, the molecules link together to form a continuous, breathable film that locks in other ingredients and repels water. This film is flexible enough to move with your skin, preventing cracking or flaking.
Pros
Long-lasting wear
Creates a flexible film that helps makeup and sunscreen resist water, sweat, and transfer for hours.
Smooth texture
Imparts a silky, non-greasy feel that makes products glide on easily and feel lightweight.
Cons and cautions
Requires double cleansing
The film can be stubborn to remove; an oil-based cleanser or micellar water is often needed to break it down.
Not biodegradable
As a synthetic silicone polymer, it does not readily break down in the environment, which may concern eco-conscious users.
Best for
- People who want long-lasting, waterproof makeup
- Those who need sunscreen that stays put during swimming or sweating
Use caution if
- Anyone avoiding silicones or synthetic polymers
- Those who prefer minimal, easily removable makeup
Usage tips
Safety summary
Generally considered safe for topical use in cosmetics. Low irritation and comedogenic risk. However, it is a synthetic polymer that may not suit all preferences.
Research notes
Limited independent studies specifically on this copolymer, but similar silicone film formers have a long history of safe use in cosmetics. The main evidence supports its function as a water-resistant film former.
Common label clues
- Typical concentration
- 1–10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar silicone polymers and found them safe at typical use levels.
- Common uses
- Long-wear foundations, Waterproof mascara, Sunscreens, Lip products
- Environmental note
- As a silicone-based polymer, it is not biodegradable and may accumulate in the environment. Some brands are moving toward bio-based alternatives.
Good to know
- This ingredient is often found in 'transfer-proof' or '24-hour wear' makeup formulas.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Bis-Hydroxylauryl Dimethicone/IPDI Copolymer in beauty products?
This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin or hair. It helps products like foundation, mascara, and sunscreen resist water, sweat, and smudging, so they last longer. It also gives a smooth, silky feel without being greasy.
What does Bis-Hydroxylauryl Dimethicone/IPDI Copolymer do in a beauty product?
When applied, the molecules link together to form a continuous, breathable film that locks in other ingredients and repels water. This film is flexible enough to move with your skin, preventing cracking or flaking.
Is Bis-Hydroxylauryl Dimethicone/IPDI Copolymer safe for most people?
Generally considered safe for topical use in cosmetics. Low irritation and comedogenic risk. However, it is a synthetic polymer that may not suit all preferences.
Who should be careful with Bis-Hydroxylauryl Dimethicone/IPDI Copolymer?
Anyone avoiding silicones or synthetic polymers Those who prefer minimal, easily removable makeup
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.