Ingredient review

TEA-Diethanolaminoethyl Polyisobutenylsuccinate

INCI: TEA-DIETHANOLAMINOETHYL POLYISOBUTENYLSUCCINATE

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

beautyskincarefilm-former

In plain English

This ingredient is a synthetic polymer that forms a thin, flexible film on your skin when applied. It's mainly used in sunscreens and long-wear makeup to make them more water-resistant and help them last longer. Think of it like a clear, invisible shield that holds the product in place. It doesn't moisturize or treat your skin—it's purely a functional ingredient for product performance.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 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

TEA-Diethanolaminoethyl Polyisobutenylsuccinate 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 TEA-Diethanolaminoethyl Polyisobutenylsuccinate.
  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 compound derived from polyisobutylene (a type of plastic) modified with succinate and amine groups, then neutralized with triethanolamine (TEA). It's designed to create a water-resistant film on the skin.

How it works

When applied, the ingredient spreads into a thin, even layer that dries to form a flexible film. This film physically blocks water from washing away other ingredients (like sunscreen filters) and helps makeup resist smudging or fading. It also slightly thickens the product for a smoother application.

Pros

Boosts water resistance

Helps sunscreen and makeup stay effective even when you sweat or swim, so you don't have to reapply as often.

Improves wear time

Creates a flexible film that keeps makeup in place for hours without cracking or flaking.

Cons and cautions

No skincare benefit

It doesn't hydrate, soothe, or treat your skin—it's purely a performance enhancer for the product.

Potential tackiness

Some users may feel a slight sticky or heavy sensation on the skin, especially in humid conditions.

Best for

  • Anyone using water-resistant sunscreen
  • People who want long-wear makeup that doesn't budge
  • Those who prefer lightweight, non-greasy film-formers

Use caution if

  • Those seeking purely natural or plant-based ingredients
  • People with very sensitive skin who react to film-formers (rare)

Usage tips

Use a gentle oil-based cleanser or micellar water to fully remove products containing this ingredient, as water alone may not break down the film.
If you have oily skin, pair with a mattifying primer to offset any potential tackiness.

Safety summary

Generally recognized as safe for topical use in cosmetics. Low irritation and comedogenic risk. No significant safety concerns at typical concentrations, though those with extreme sensitivity should patch-test.

Research notes

Limited independent studies on this specific compound, but it is structurally similar to other polyisobutylene-based film-formers that have been reviewed by the CIR panel and found safe. Its primary function is physical film formation, not biological activity.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar polyisobutylene derivatives and found them safe at typical use levels.
Common uses
Sunscreens, Water-resistant formulas, Long-wear makeup
Environmental note
As a synthetic polymer, it may not be biodegradable. However, it is used in low concentrations and is not known to accumulate in the environment significantly.

Good to know

  • This ingredient is often found in combination with other film-formers for extra durability.
  • It is considered safe by major regulatory bodies when used within typical concentrations.

Common questions

What is TEA-Diethanolaminoethyl Polyisobutenylsuccinate in beauty products?

This ingredient is a synthetic polymer that forms a thin, flexible film on your skin when applied. It's mainly used in sunscreens and long-wear makeup to make them more water-resistant and help them last longer. Think of it like a clear, invisible shield that holds the product in place. It doesn't moisturize or treat your skin—it's purely a functional ingredient for product performance.

What does TEA-Diethanolaminoethyl Polyisobutenylsuccinate do in a beauty product?

When applied, the ingredient spreads into a thin, even layer that dries to form a flexible film. This film physically blocks water from washing away other ingredients (like sunscreen filters) and helps makeup resist smudging or fading. It also slightly thickens the product for a smoother application.

Is TEA-Diethanolaminoethyl Polyisobutenylsuccinate safe for most people?

Generally recognized as safe for topical use in cosmetics. Low irritation and comedogenic risk. No significant safety concerns at typical concentrations, though those with extreme sensitivity should patch-test.

Who should be careful with TEA-Diethanolaminoethyl Polyisobutenylsuccinate?

Those seeking purely natural or plant-based ingredients People with very sensitive skin who react to film-formers (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Polyisobutylene SafetyOpenEuropean Chemicals Agency (ECHA) - Substance InfoOpenPubMed - Film-Formers in SunscreenOpen

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.