Ingredient review
Aminopropyl Calcium Polysilsesquioxane Chloride
INCI: Aminopropyl Calcium Polysilsesquioxane Chloride
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefits.
In plain English
This is a man-made ingredient that forms a thin, invisible film on your skin. It's often added to sunscreens and long-wear makeup to help them stay in place longer and resist water and sweat. Think of it like a gentle, breathable seal that helps your product last through the day without feeling heavy or sticky.
Quick decision guide
Useful, but context matters
Aminopropyl Calcium Polysilsesquioxane Chloride 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 Aminopropyl Calcium Polysilsesquioxane Chloride.
- 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 silicone polymer modified with calcium and amino groups, designed to create a flexible, water-resistant film on the skin or hair.
How it works
When applied, the ingredient spreads into a thin, even layer. As the product dries, it forms a flexible film that physically blocks water and oil from breaking down the product underneath, helping makeup or sunscreen stay put longer.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective even when you sweat or swim, so you don't have to reapply as often.
Lightweight feel
Unlike some older film-formers, this ingredient creates a flexible film that doesn't feel stiff or mask-like on the skin.
Cons and cautions
No skincare benefit
It only forms a film and doesn't hydrate, soothe, or protect the skin in any active way.
Can feel drying over time
The film may trap in existing moisture but can also feel tight or drying on skin that's already parched.
Best for
- People who need long-wearing, water-resistant sunscreen or makeup
- Those with oily or combination skin who want a matte, stay-put finish
Use caution if
- Anyone with very dry or dehydrated skin who prefers hydrating, non-film-forming products
Usage tips
Safety summary
Aminopropyl Calcium Polysilsesquioxane Chloride is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with very sensitive skin may notice a slight tightening sensation.
Research notes
There is limited independent research on this specific ingredient, but it belongs to a well-studied class of silicone film-formers used safely in cosmetics for decades. Its safety is supported by industry self-regulation and regulatory approvals.
Common label clues
- Typical concentration
- Typically used at 1–5% in formulations
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No specific concentration restrictions are common, but formulators follow good manufacturing practices.
- Common uses
- Sunscreens, Long-wear foundations, Water-resistant makeup, Lip products
- Environmental note
- As a silicone-based polymer, it may not be readily biodegradable. Some manufacturers are exploring more eco-friendly alternatives.
Good to know
- This ingredient is not a sunscreen active itself; it only helps the sunscreen formula stay on the skin longer.
- It is considered safe for use in cosmetics by major regulatory bodies when used as directed.
Common questions
What is Aminopropyl Calcium Polysilsesquioxane Chloride in beauty products?
This is a man-made ingredient that forms a thin, invisible film on your skin. It's often added to sunscreens and long-wear makeup to help them stay in place longer and resist water and sweat. Think of it like a gentle, breathable seal that helps your product last through the day without feeling heavy or sticky.
What does Aminopropyl Calcium Polysilsesquioxane Chloride do in a beauty product?
When applied, the ingredient spreads into a thin, even layer. As the product dries, it forms a flexible film that physically blocks water and oil from breaking down the product underneath, helping makeup or sunscreen stay put longer.
Is Aminopropyl Calcium Polysilsesquioxane Chloride safe for most people?
Aminopropyl Calcium Polysilsesquioxane Chloride is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with very sensitive skin may notice a slight tightening sensation.
Who should be careful with Aminopropyl Calcium Polysilsesquioxane Chloride?
Anyone with very dry or dehydrated skin who prefers hydrating, non-film-forming products
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.