Ingredient review
Dimethylbutyl Crotonate
INCI: Dimethylbutyl Crotonate
A synthetic film-former that helps products stay put and resist water, but it's not a star ingredient for skin health.
In plain English
Dimethylbutyl Crotonate is a man-made ingredient that creates a thin, flexible film on your skin. Think of it like a clear, invisible shield that helps makeup or sunscreen stay in place longer and resist sweat or water. It doesn't actively moisturize or treat your skin—it's more about improving how a product feels and performs.
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
Dimethylbutyl Crotonate 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 Dimethylbutyl Crotonate.
- 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 ester derived from crotonic acid and 3,3-dimethylbutanol. It is a clear, colorless liquid used in cosmetics for its film-forming and water-resistant properties.
How it works
When applied to the skin, Dimethylbutyl Crotonate forms a continuous, flexible film that helps other ingredients (like pigments or UV filters) adhere better and resist removal by water or friction. This film is breathable and non-sticky, so it doesn't feel heavy or clog pores.
Pros
Boosts wear time
Helps makeup and sunscreen stay put for hours, even in humid or wet conditions.
Water-resistant
Adds water resistance to sunscreens, making them more effective during swimming or sweating.
Cons and cautions
Not moisturizing
Does not hydrate or nourish the skin; it only forms a film on the surface.
Potential tightness
On very dry or sensitive skin, the film can feel slightly tight or uncomfortable.
Best for
- People who want long-lasting makeup or water-resistant sunscreen
- Those with normal to oily skin looking for a matte finish
Use caution if
- Individuals with very dry or compromised skin barriers who may find film-formers uncomfortable
- Anyone seeking purely hydrating or active skincare ingredients
Usage tips
Safety summary
Dimethylbutyl Crotonate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, it is not a hydrating ingredient and may feel drying on very sensitive skin.
Research notes
Research on Dimethylbutyl Crotonate specifically is limited, but it belongs to a class of film-forming esters that have been evaluated for safety and efficacy in cosmetic applications. Studies on similar esters show good skin compatibility and water resistance.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, USA, and many other countries. The Cosmetic Ingredient Review (CIR) panel has reviewed similar esters and found them safe as used.
- Common uses
- Sunscreens, Color cosmetics, Long-wear makeup, Skin care formulations
- Environmental note
- As a synthetic compound, its environmental fate is not extensively studied, but it is not known to be bioaccumulative or toxic to aquatic life at typical use levels.
Good to know
- Dimethylbutyl Crotonate is often found in 'long-wear' or 'water-resistant' formulas.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Dimethylbutyl Crotonate in beauty products?
Dimethylbutyl Crotonate is a man-made ingredient that creates a thin, flexible film on your skin. Think of it like a clear, invisible shield that helps makeup or sunscreen stay in place longer and resist sweat or water. It doesn't actively moisturize or treat your skin—it's more about improving how a product feels and performs.
What does Dimethylbutyl Crotonate do in a beauty product?
When applied to the skin, Dimethylbutyl Crotonate forms a continuous, flexible film that helps other ingredients (like pigments or UV filters) adhere better and resist removal by water or friction. This film is breathable and non-sticky, so it doesn't feel heavy or clog pores.
Is Dimethylbutyl Crotonate safe for most people?
Dimethylbutyl Crotonate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, it is not a hydrating ingredient and may feel drying on very sensitive skin.
Who should be careful with Dimethylbutyl Crotonate?
Individuals with very dry or compromised skin barriers who may find film-formers uncomfortable Anyone seeking purely hydrating or active skincare ingredients
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.