Ingredient review

Acryloyloxy Propyltrimethoxylane

INCI: ACRYLOYLOXY PROPYLTRIMETHOXYLANE

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

beautyskincarefilm-former

In plain English

This is a man-made ingredient that creates a thin, invisible film on your skin. It helps makeup last longer and makes sunscreens more water-resistant. Think of it like a clear, breathable shield that keeps the product from sliding off.

Quick decision guide

Useful, but context matters

Acryloyloxy Propyltrimethoxylane 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acryloyloxy Propyltrimethoxylane.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

Acryloyloxy Propyltrimethoxylane is a silicone-based polymer. It is a synthetic compound designed to form a flexible, water-resistant film when applied to the skin. It is often used in combination with other film-formers.

How it works

When applied, the molecules link together as the solvent (water or alcohol) evaporates, forming a continuous, flexible film. This film physically blocks water and helps other ingredients (like sunscreen filters or pigments) stay in place on the skin's surface.

Pros

Boosts wear time

Helps makeup and sunscreen stay put for hours, even in humidity or water exposure, so you don't have to reapply as often.

Lightweight feel

The film is thin and flexible, so it doesn't feel heavy or cakey on the skin, making it comfortable for daily use.

Cons and cautions

No skin benefits

This ingredient is purely functional—it doesn't hydrate, soothe, or treat the skin. It's only there for texture and durability.

Potential tightness

On very dry or compromised skin, the film can create a slight tightening sensation, which some may find uncomfortable.

Best for

  • People who want long-wearing makeup or water-resistant sunscreen
  • Those with oily skin who prefer a matte, stay-put finish

Use caution if

  • Individuals with very dry or dehydrated skin who prioritize hydration over wear time

Usage tips

Use a hydrating moisturizer underneath products containing this ingredient to avoid any tightness.
Double-cleanse at the end of the day to ensure the film is fully removed, especially if you wear it in sunscreen or long-wear makeup.

Safety summary

Acryloyloxy Propyltrimethoxylane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. No significant safety concerns have been raised by regulatory bodies.

Research notes

Research on this specific ingredient is limited, but it belongs to a well-studied class of silicone film-formers. Safety assessments by cosmetic ingredient review panels have found these compounds to be safe when used as directed.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
Common uses
Sunscreens, Long-wear foundations, Water-resistant formulas
Environmental note
As a synthetic silicone-based polymer, its biodegradability is limited. However, it is used in very small amounts per product.

Good to know

  • This ingredient is often listed near the end of an ingredient list because it is used in low concentrations.
  • It is not a sunscreen active ingredient—it only helps the sunscreen stay on your skin longer.

Common questions

What is Acryloyloxy Propyltrimethoxylane in beauty products?

This is a man-made ingredient that creates a thin, invisible film on your skin. It helps makeup last longer and makes sunscreens more water-resistant. Think of it like a clear, breathable shield that keeps the product from sliding off.

What does Acryloyloxy Propyltrimethoxylane do in a beauty product?

When applied, the molecules link together as the solvent (water or alcohol) evaporates, forming a continuous, flexible film. This film physically blocks water and helps other ingredients (like sunscreen filters or pigments) stay in place on the skin's surface.

Is Acryloyloxy Propyltrimethoxylane safe for most people?

Acryloyloxy Propyltrimethoxylane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. No significant safety concerns have been raised by regulatory bodies.

Who should be careful with Acryloyloxy Propyltrimethoxylane?

Individuals with very dry or dehydrated skin who prioritize hydration over wear time

Research sources

Cosmetic Ingredient Review (CIR) - Safety of Silicone Film FormersOpenEuropean Chemicals Agency (ECHA) - Substance InformationOpenPubMed - Film-forming polymers in cosmeticsOpen

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.