Ingredient review
Polyacrylate-45
INCI: Polyacrylate-45
A synthetic polymer that helps products stay put and resist water, but may feel tight or dry on some skin types.
In plain English
Polyacrylate-45 is a man-made ingredient that forms a thin, flexible film on your skin or hair. Think of it like a very light, invisible shield that helps sunscreen stay on longer, makeup not smudge, or hair hold its style. It's often used to make products water-resistant and long-lasting.
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
Polyacrylate-45 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 Polyacrylate-45.
- 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
Polyacrylate-45 is a synthetic polymer—a large molecule made of repeating units—designed to create a film on the skin or hair. It belongs to the acrylate family of ingredients, which are widely used in cosmetics for their film-forming and thickening properties.
How it works
When applied, the polymer chains spread out and then link together as the water or solvent evaporates, forming a continuous, flexible film. This film helps other ingredients (like sunscreen filters or pigments) adhere evenly and resist removal by water, sweat, or friction.
Pros
Boosts wear time
Creates a flexible film that helps makeup and sunscreen stay put for hours, even in humidity or water.
Lightweight feel
Unlike some heavy waxes or oils, polyacrylate-45 forms a thin, barely-there layer that doesn't feel greasy.
Cons and cautions
Can feel tight
On dry or sensitive skin, the film may create a slight tightening sensation, especially if layered under other products.
Requires double cleansing
Because it forms a water-resistant film, a simple water rinse won't remove it—you'll need an oil-based cleanser or micellar water.
Best for
- People who want long-wearing makeup or water-resistant sunscreen
- Those with oily or combination skin who prefer a matte finish
Use caution if
- Individuals with very dry or dehydrated skin who find film-formers uncomfortable
Usage tips
Safety summary
Polyacrylate-45 is generally recognized as safe for topical use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, though individuals with very dry or sensitive skin may experience a tight feeling. No significant systemic safety concerns have been identified.
Research notes
Safety assessments of acrylate polymers, including polyacrylate-45, have been conducted by industry and regulatory panels. They are considered safe for use in rinse-off and leave-on products at concentrations up to 5%. Research on environmental persistence is limited but ongoing.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other countries. Typical concentrations are considered safe.
- Common uses
- Sunscreens, Primers, Long-wear makeup, Hair styling products
- Environmental note
- As a synthetic polymer, polyacrylate-45 is not readily biodegradable. Its environmental impact is an area of ongoing study, and some consumers may prefer biodegradable alternatives.
Good to know
- Polyacrylate-45 is often used in combination 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 when used as directed.
Common questions
What is Polyacrylate-45 in beauty products?
Polyacrylate-45 is a man-made ingredient that forms a thin, flexible film on your skin or hair. Think of it like a very light, invisible shield that helps sunscreen stay on longer, makeup not smudge, or hair hold its style. It's often used to make products water-resistant and long-lasting.
What does Polyacrylate-45 do in a beauty product?
When applied, the polymer chains spread out and then link together as the water or solvent evaporates, forming a continuous, flexible film. This film helps other ingredients (like sunscreen filters or pigments) adhere evenly and resist removal by water, sweat, or friction.
Is Polyacrylate-45 safe for most people?
Polyacrylate-45 is generally recognized as safe for topical use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, though individuals with very dry or sensitive skin may experience a tight feeling. No significant systemic safety concerns have been identified.
Who should be careful with Polyacrylate-45?
Individuals with very dry or dehydrated skin who find film-formers uncomfortable
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.