Ingredient review
Lauryl Methacrylate/Sodium Methacrylate Crosspolymer
INCI: LAURYL METHACRYLATE/SODIUM METHACRYLATE CROSSPOLYMER
A safe synthetic thickener that improves product texture and stability without common irritation concerns.
In plain English
This ingredient is a synthetic polymer—a large molecule made from repeating units—that helps give skincare products a smooth, creamy texture. It works by forming a light network that thickens the formula and helps other ingredients stay evenly mixed. Think of it like a gentle scaffolding that holds everything together, so your lotion or sunscreen doesn't separate or feel watery.
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
Lauryl Methacrylate/Sodium Methacrylate Crosspolymer 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 Lauryl Methacrylate/Sodium Methacrylate Crosspolymer.
- 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 crosslinked copolymer of lauryl methacrylate and sodium methacrylate, created through a controlled chemical reaction. It is a white powder that swells and thickens when added to water-based formulas.
How it works
When mixed into a product, the polymer particles absorb water and swell, increasing the viscosity (thickness) of the formula. The crosslinked structure also helps stabilize emulsions (oil and water mixtures) and can form a thin, flexible film on the skin, which may improve water resistance in sunscreens.
Pros
Gentle on skin
Has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Improves product feel
Creates a smooth, non-sticky texture that spreads easily and feels lightweight on the skin.
Cons and cautions
Synthetic origin
Derived from petroleum-based chemicals, which may not align with preferences for natural or organic skincare.
No active skin benefit
Functions only as a texturizer and stabilizer; it does not hydrate, soothe, or treat the skin directly.
Best for
- Anyone who prefers lightweight, stable lotions or creams
- People with sensitive or acne-prone skin looking for non-irritating thickeners
Use caution if
- Those who strictly avoid synthetic or petroleum-derived ingredients
Usage tips
Safety summary
Lauryl Methacrylate/Sodium Methacrylate Crosspolymer is considered safe for use in cosmetics at typical concentrations. It has low skin irritation and comedogenic potential, and no significant toxicity concerns have been reported in available safety assessments.
Research notes
Safety data is primarily derived from industry assessments and regulatory reviews. No peer-reviewed human studies on this specific polymer were found, but it is structurally similar to other safe methacrylate crosspolymers used in cosmetics.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA (as a cosmetic ingredient) and the EU Cosmetics Regulation. No concentration restrictions are typically imposed.
- Common uses
- Moisturizers, Sunscreens, Serums, Makeup
- Environmental note
- As a synthetic polymer, it is not biodegradable and may persist in the environment. However, it is used in very small amounts and is not known to bioaccumulate.
Good to know
- This polymer is often used in 'invisible' or 'weightless' sunscreen formulas to improve spreadability and water resistance.
- It is considered safe by major regulatory bodies at typical use levels.
Common questions
What is Lauryl Methacrylate/Sodium Methacrylate Crosspolymer in beauty products?
This ingredient is a synthetic polymer—a large molecule made from repeating units—that helps give skincare products a smooth, creamy texture. It works by forming a light network that thickens the formula and helps other ingredients stay evenly mixed. Think of it like a gentle scaffolding that holds everything together, so your lotion or sunscreen doesn't separate or feel watery.
What does Lauryl Methacrylate/Sodium Methacrylate Crosspolymer do in a beauty product?
When mixed into a product, the polymer particles absorb water and swell, increasing the viscosity (thickness) of the formula. The crosslinked structure also helps stabilize emulsions (oil and water mixtures) and can form a thin, flexible film on the skin, which may improve water resistance in sunscreens.
Is Lauryl Methacrylate/Sodium Methacrylate Crosspolymer safe for most people?
Lauryl Methacrylate/Sodium Methacrylate Crosspolymer is considered safe for use in cosmetics at typical concentrations. It has low skin irritation and comedogenic potential, and no significant toxicity concerns have been reported in available safety assessments.
Who should be careful with Lauryl Methacrylate/Sodium Methacrylate Crosspolymer?
Those who strictly avoid synthetic or petroleum-derived 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.