Ingredient review
Distearate-75 IPDI
INCI: DISTEARETH-75 IPDI
A synthetic film-former that helps products stay put and feel smooth, but offers no active skincare benefits.
In plain English
Distearate-75 IPDI is a synthetic ingredient that forms a thin, flexible film on your skin. Think of it like a very light, invisible glove that helps other ingredients stay in place and keeps moisture from escaping. It's often used in sunscreens and long-wear makeup to improve water resistance and durability.
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
Distearate-75 IPDI 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 Distearate-75 IPDI.
- 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
A synthetic polymer created by reacting distearyl alcohol with isophorone diisocyanate (IPDI). It belongs to a class of ingredients called polyurethanes, which are known for their film-forming and water-resistant properties.
How it works
When applied, the molecules link together to form a continuous, breathable film on the skin's surface. This film reduces water loss (improving moisturization) and helps other ingredients like sunscreen actives or pigments stay in place longer, even when exposed to water or sweat.
Pros
Boosts product staying power
Helps sunscreen and makeup resist water, sweat, and rubbing, so you don't have to reapply as often.
Smooth, silky feel
Creates a velvety texture on skin that makes products glide on easily and reduces the sticky or tacky feeling.
Cons and cautions
Synthetic and not biodegradable
As a man-made polymer, it doesn't break down easily in the environment, which may be a concern for eco-conscious users.
No active skincare benefit
It only improves texture and wear—it doesn't hydrate, brighten, or treat skin concerns on its own.
Best for
- People who want long-wearing makeup or water-resistant sunscreen
- Those with normal to oily skin looking for a smooth, non-greasy finish
Use caution if
- Anyone with a known sensitivity to polyurethanes or isocyanates (rare)
Usage tips
Safety summary
Distearate-75 IPDI is considered safe for topical use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies. However, individuals with rare sensitivities to polyurethanes should patch-test first.
Research notes
Research on this specific ingredient is limited, but it belongs to a well-studied class of polyurethane film-formers. Studies on similar polymers confirm their safety and efficacy in improving water resistance and wear time in cosmetic formulations.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe at typical concentrations.
- Common uses
- Moisturizers, Sunscreens, Makeup primers, Long-wear foundations
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. However, it is used in low concentrations and is not known to bioaccumulate.
Good to know
- Distearate-75 IPDI is often listed near the end of ingredient lists because it's used in small amounts.
- It's considered safe by major cosmetic safety panels, including the Cosmetic Ingredient Review (CIR).
Common questions
What is Distearate-75 IPDI in beauty products?
Distearate-75 IPDI is a synthetic ingredient that forms a thin, flexible film on your skin. Think of it like a very light, invisible glove that helps other ingredients stay in place and keeps moisture from escaping. It's often used in sunscreens and long-wear makeup to improve water resistance and durability.
What does Distearate-75 IPDI do in a beauty product?
When applied, the molecules link together to form a continuous, breathable film on the skin's surface. This film reduces water loss (improving moisturization) and helps other ingredients like sunscreen actives or pigments stay in place longer, even when exposed to water or sweat.
Is Distearate-75 IPDI safe for most people?
Distearate-75 IPDI is considered safe for topical use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies. However, individuals with rare sensitivities to polyurethanes should patch-test first.
Who should be careful with Distearate-75 IPDI?
Anyone with a known sensitivity to polyurethanes or isocyanates (rare)
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.