Ingredient review

Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer

INCI: BIS-DECYLTETRADECANYL IPDI/PEG-795 COPOLYMER

A synthetic polymer that helps products stay put longer, but may feel heavy or tight on some skin types.

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In plain English

This is a man-made ingredient that forms a thin, invisible film on your skin or hair. It helps makeup, sunscreen, or styling products resist water, sweat, and smudging. Think of it like a flexible, breathable plastic wrap that keeps the product in place without being sticky.

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

Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer 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-Decyltetradecanyl IPDI/PEG-795 Copolymer.
  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 large synthetic molecule (polymer) created by combining isophorone diisocyanate (IPDI) with a long-chain alcohol and a polyethylene glycol (PEG) derivative. It is designed specifically to form a durable, flexible film on surfaces.

How it works

When applied, the polymer molecules link together as the solvent (water or alcohol) evaporates, creating a continuous, water-resistant film. This film physically locks in other ingredients (like sunscreen filters or pigments) and prevents them from migrating or washing off easily.

Pros

Boosts wear time

Helps makeup and sunscreen last through sweat, humidity, and water exposure without breaking down.

Enhances sunscreen efficacy

Keeps UV filters evenly spread on skin, reducing the chance of gaps in protection during swimming or exercise.

Cons and cautions

Can feel tight or heavy

On dry or sensitive skin, the film may create a noticeable tightness or a slightly heavy sensation.

Requires double cleansing

Water-resistant films often need an oil-based cleanser or micellar water to be fully removed, adding an extra step to your routine.

Best for

  • People who want long-wearing makeup or water-resistant sunscreen
  • Those with normal to oily skin who don't mind a slight film feel

Use caution if

  • Individuals with very dry or dehydrated skin who prefer lightweight, breathable formulas
  • Anyone who dislikes the sensation of a film on their skin

Usage tips

Use an oil-based cleanser or balm to thoroughly remove products containing this polymer at the end of the day.
If you have dry skin, apply a hydrating serum or moisturizer underneath products with this ingredient to minimize any tight feeling.
Shake the product well before use to ensure the polymer is evenly dispersed for consistent film formation.

Safety summary

Generally recognized as safe for topical use at typical concentrations. The PEG component is purified to remove impurities. Some individuals with very sensitive skin may experience mild tightness or irritation, but this is rare. Always patch test new products.

Research notes

Limited independent studies exist specifically on this polymer, but it belongs to a well-studied class of polyurethane film-formers used in cosmetics for decades. Safety assessments by industry panels (e.g., CIR) have found similar polymers safe for use.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US (FDA), EU (CosIng), and other major markets. No specific concentration restrictions are listed, but manufacturers follow good manufacturing practices to ensure purity.
Common uses
Sunscreens, Long-wear foundations, Waterproof mascaras, Hair styling products
Environmental note
As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not classified as a microplastic under current definitions. Efforts are ongoing to develop more eco-friendly alternatives.

Good to know

  • This polymer is often used in combination with other film-formers to fine-tune flexibility and water resistance.
  • PEG compounds are purified during manufacturing, but some consumers prefer to avoid them due to potential contamination concerns (though cosmetic-grade PEGs are considered safe by regulators).

Common questions

What is Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer in beauty products?

This is a man-made ingredient that forms a thin, invisible film on your skin or hair. It helps makeup, sunscreen, or styling products resist water, sweat, and smudging. Think of it like a flexible, breathable plastic wrap that keeps the product in place without being sticky.

What does Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer do in a beauty product?

When applied, the polymer molecules link together as the solvent (water or alcohol) evaporates, creating a continuous, water-resistant film. This film physically locks in other ingredients (like sunscreen filters or pigments) and prevents them from migrating or washing off easily.

Is Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer safe for most people?

Generally recognized as safe for topical use at typical concentrations. The PEG component is purified to remove impurities. Some individuals with very sensitive skin may experience mild tightness or irritation, but this is rare. Always patch test new products.

Who should be careful with Bis-Decyltetradecanyl IPDI/PEG-795 Copolymer?

Individuals with very dry or dehydrated skin who prefer lightweight, breathable formulas Anyone who dislikes the sensation of a film on their skin

Research sources

CosIng Database - European CommissionOpenCIR Safety Review of Polyurethane PolymersOpenPubMed - Film-forming polymers in sunscreensOpen

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.