Ingredient review
Butylcarbamoethyl Methacrylate
INCI: Butylcarbamoethyl Methacrylate
A synthetic film-former that helps makeup and skincare stay put, but offers no active skin benefit.
In plain English
This is a synthetic ingredient that creates a flexible, invisible film on your skin. It helps makeup resist smudging, water, and sweat, and can also help sunscreen stay effective longer. Think of it like a clear, breathable shield that holds other ingredients in place. It doesn't moisturize or treat skin—it's purely a performance enhancer for the product's wear.
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
Butylcarbamoethyl Methacrylate 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 Butylcarbamoethyl Methacrylate.
- 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
Butylcarbamoethyl Methacrylate is a synthetic polymer—a large molecule made by linking smaller chemical units. It belongs to the methacrylate family, widely used in cosmetics for its film-forming and water-resistant properties.
How it works
When applied, the ingredient dries down to form a thin, flexible film on the skin's surface. This film physically locks in pigments and active ingredients, reducing transfer, smudging, and wash-off. It also helps distribute ingredients evenly and can improve the sensory feel of a product.
Pros
Long-lasting wear
Helps makeup and sunscreen stay put for hours without fading or transferring, even in humid conditions.
Water and sweat resistant
Creates a barrier that resists moisture, making it ideal for active lifestyles or rainy days.
Cons and cautions
No active skin benefit
This ingredient is purely functional—it doesn't hydrate, soothe, or treat skin conditions.
Potential tightness
On very dry or compromised skin, the film can feel tight or slightly uncomfortable, especially in matte formulas.
Best for
- Anyone wanting long-wear makeup that resists smudging
- People who need water-resistant sunscreens for outdoor activities
Use caution if
- Those with very dry or irritated skin who prefer a dewy, hydrating finish
- Individuals with known allergies to methacrylate compounds (rare)
Usage tips
Safety summary
Butylcarbamoethyl Methacrylate is considered safe for topical use in cosmetics. It has low irritation and comedogenic potential. Allergic reactions are rare, but patch testing is recommended for those with sensitive skin or known methacrylate allergies.
Research notes
Safety assessments by cosmetic ingredient review panels have found this ingredient to be safe at typical use levels. Most data comes from industry safety dossiers rather than independent clinical studies, but no significant concerns have been raised.
Common label clues
- Typical concentration
- Typically 1–10% in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific concentration restrictions are common, but formulators follow good manufacturing practices.
- Common uses
- Long-wear foundations, Waterproof eyeliners, Lip products, Sun protection formulas
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to accumulate in the environment significantly.
Good to know
- This ingredient is often combined with other film-formers to fine-tune the feel and durability of a product.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Butylcarbamoethyl Methacrylate in beauty products?
This is a synthetic ingredient that creates a flexible, invisible film on your skin. It helps makeup resist smudging, water, and sweat, and can also help sunscreen stay effective longer. Think of it like a clear, breathable shield that holds other ingredients in place. It doesn't moisturize or treat skin—it's purely a performance enhancer for the product's wear.
What does Butylcarbamoethyl Methacrylate do in a beauty product?
When applied, the ingredient dries down to form a thin, flexible film on the skin's surface. This film physically locks in pigments and active ingredients, reducing transfer, smudging, and wash-off. It also helps distribute ingredients evenly and can improve the sensory feel of a product.
Is Butylcarbamoethyl Methacrylate safe for most people?
Butylcarbamoethyl Methacrylate is considered safe for topical use in cosmetics. It has low irritation and comedogenic potential. Allergic reactions are rare, but patch testing is recommended for those with sensitive skin or known methacrylate allergies.
Who should be careful with Butylcarbamoethyl Methacrylate?
Those with very dry or irritated skin who prefer a dewy, hydrating finish Individuals with known allergies to methacrylate compounds (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.