Ingredient review

Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate

INCI: BIS-HYDROXYETHOXYPROPYL DIMETHICONE/IPDI COPOLYMER ETHYLCARBAMATE

A synthetic film former that helps products stay put and resist water, but may feel heavy on some skin types.

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In plain English

This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable raincoat — it helps makeup or sunscreen stay in place longer and resist sweat or water. It's often used in long-wear and waterproof products. While generally safe and non-irritating, it can feel a bit heavy or tacky for some people, especially those with oily skin.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate 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 Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate.
  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

A synthetic copolymer made from silicone (dimethicone) and a polyurethane-like component (IPDI). It is designed to create a durable, flexible film that is water-resistant and helps other ingredients adhere to the skin or hair.

How it works

When applied, the polymer chains spread out and then link together as the solvent (water or alcohol) evaporates, forming a continuous, flexible film. This film physically blocks water and helps lock in the product's active ingredients, improving wear time and water resistance.

Pros

Excellent water resistance

Helps sunscreen and makeup stay effective even when you sweat or swim, reducing the need for frequent reapplication.

Flexible, non-cracking film

Unlike some older film formers, this polymer creates a film that moves with your skin, so it won't crack or flake off during the day.

Cons and cautions

Can feel heavy on skin

The film it creates may feel noticeable or tacky, especially on oily skin, which some people find uncomfortable.

Requires thorough removal

Because it's water-resistant, a regular cleanser may not remove it completely — you may need an oil-based cleanser or micellar water to avoid buildup.

Best for

  • People who need long-wearing or waterproof makeup
  • Those using water-resistant sunscreens for outdoor activities

Use caution if

  • Individuals with very oily or acne-prone skin who prefer lightweight, non-film-forming products

Usage tips

Use an oil-based cleanser or micellar water first to break down the film, then follow with your regular cleanser.
If you have oily skin, apply a lightweight moisturizer underneath to help reduce any tacky feel.
Shake the product well before use to ensure the polymer is evenly dispersed.

Safety summary

Considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No known significant health risks, though environmental persistence is a concern.

Research notes

Safety is supported by industry data and regulatory reviews. Specific clinical studies on this exact polymer are limited, but similar silicone film formers have a long history of safe use in cosmetics.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
Common uses
Sunscreens, Long-wear foundations, Waterproof mascara, Hair styling products
Environmental note
As a silicone-based polymer, it is not readily biodegradable and may accumulate in the environment. Some brands are moving toward more eco-friendly alternatives.

Good to know

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

Common questions

What is Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate in beauty products?

This ingredient is a type of silicone polymer that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable raincoat — it helps makeup or sunscreen stay in place longer and resist sweat or water. It's often used in long-wear and waterproof products. While generally safe and non-irritating, it can feel a bit heavy or tacky for some people, especially those with oily skin.

What does Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate do in a beauty product?

When applied, the polymer chains spread out and then link together as the solvent (water or alcohol) evaporates, forming a continuous, flexible film. This film physically blocks water and helps lock in the product's active ingredients, improving wear time and water resistance.

Is Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate safe for most people?

Considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No known significant health risks, though environmental persistence is a concern.

Who should be careful with Bis-Hydroxyethoxypropyl Dimethicone/IPDI Copolymer Ethylcarbamate?

Individuals with very oily or acne-prone skin who prefer lightweight, non-film-forming products

Research sources

Cosmetic Ingredient Review (CIR) - Safety of Silicone Film FormersOpenEuropean Chemicals Agency (ECHA) - Substance InformationOpenPubMed - Silicone 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.