Ingredient review
Ethoxyethyl Cyanoacrylate
INCI: ETHOXYETHYL CYANOACRYLATE
A strong synthetic adhesive for nails and lashes, but can cause irritation if misused or if you have a sensitivity.
In plain English
Ethoxyethyl cyanoacrylate is a type of super-strong glue used in nail and lash products. It works by forming a hard, clear film when it touches moisture in the air or on your skin. While it's great for keeping fake nails and lashes in place, it can irritate the skin or eyes if it comes into contact with them, and some people develop an allergy over time.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ethoxyethyl Cyanoacrylate can be useful, but watch for some irritation potential.
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 Ethoxyethyl Cyanoacrylate.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 cyanoacrylate monomer that polymerizes rapidly in the presence of moisture to form a strong, durable adhesive film.
How it works
When applied, the monomer reacts with trace moisture on the nail or skin surface, forming long polymer chains that create a hard, clear bond. This film holds artificial nails or lashes firmly in place until it is removed with a solvent.
Pros
Strong hold
Creates a durable bond that keeps nails and lashes in place for days, even with daily wear.
Fast drying
Sets within seconds, making application quick and convenient for both professionals and at-home users.
Cons and cautions
Irritation risk
Direct skin or eye contact can cause redness, stinging, or irritation, especially if used carelessly.
Allergy potential
Repeated exposure can lead to allergic contact dermatitis, causing swelling, itching, or rash around the nails or eyes.
Best for
- People who want strong, long-lasting hold for artificial nails or lashes
- Those without known cyanoacrylate allergies
Use caution if
- Anyone with a known allergy to cyanoacrylates or formaldehyde
- People with sensitive skin or eyes, or those prone to contact dermatitis
Usage tips
Safety summary
Generally safe for intended use on nails and lashes, but carries a moderate risk of skin and eye irritation, and a small risk of allergic sensitization with repeated use. Avoid contact with skin and eyes, and discontinue use if irritation occurs.
Research notes
Cyanoacrylates are well-studied as medical and cosmetic adhesives. Allergic reactions are documented but relatively uncommon. Most safety data focus on skin sensitization and proper use guidelines.
Common label clues
- Typical concentration
- Typically 5–20% in nail glues; lower in lash adhesives
- Regulatory status
- Approved for cosmetic use in the EU, US, and many other regions, but must be labeled with appropriate warnings about skin and eye contact.
- Common uses
- Nail glues, Lash adhesives, Artificial nail products
- Environmental note
- As a synthetic polymer, it is not biodegradable and should be disposed of according to local chemical waste guidelines.
Good to know
- Cyanoacrylate adhesives are sometimes referred to as 'super glue' in household contexts.
- If glue accidentally bonds skin, soak in warm soapy water or use acetone-based nail polish remover to loosen the bond.
Common questions
What is Ethoxyethyl Cyanoacrylate in beauty products?
Ethoxyethyl cyanoacrylate is a type of super-strong glue used in nail and lash products. It works by forming a hard, clear film when it touches moisture in the air or on your skin. While it's great for keeping fake nails and lashes in place, it can irritate the skin or eyes if it comes into contact with them, and some people develop an allergy over time.
What does Ethoxyethyl Cyanoacrylate do in a beauty product?
When applied, the monomer reacts with trace moisture on the nail or skin surface, forming long polymer chains that create a hard, clear bond. This film holds artificial nails or lashes firmly in place until it is removed with a solvent.
Is Ethoxyethyl Cyanoacrylate safe for most people?
Generally safe for intended use on nails and lashes, but carries a moderate risk of skin and eye irritation, and a small risk of allergic sensitization with repeated use. Avoid contact with skin and eyes, and discontinue use if irritation occurs.
Who should be careful with Ethoxyethyl Cyanoacrylate?
Anyone with a known allergy to cyanoacrylates or formaldehyde People with sensitive skin or eyes, or those prone to contact dermatitis
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.