What Is Nylon-611?
Nylon-611 is a synthetic polyamide produced when undecanoic acid, a fatty acid usually derived from castor oil, reacts with hexylenediamine. The result is a fine, lightweight powder that behaves much like other nylons used in fabrics yet is tailored for skin-contact applications. First introduced to the beauty industry in the late 1990s as brands searched for new ways to improve product feel, Nylon-611 quickly gained traction for its soft focus finish and oil-absorbing properties. Manufacturing involves controlled polymerization of the two raw materials, followed by milling and sieving to create a uniform particle size suitable for cosmetics. Today you’ll spot Nylon-611 in pressed powders, loose setting powders, oil-control primers, matte foundations, dry shampoos, clay masks and some sunscreens where a smooth, velvety texture is desired.
Nylon-611’s Cosmetic Benefits/Uses
In skincare and makeup formulas Nylon-611 serves one key purpose.
As an absorbent, it soaks up excess oil and sweat on the skin surface which helps products stay put longer and leaves a soft matte finish. This oil-control quality can reduce visible shine, blur the look of pores and lend powders a silky glide that feels comfortable even on sensitive or combination skin.
Who Can Use Nylon-611
Nylon-611 is generally best suited to oily, combination and normal skin because its light oil-absorbing action helps reduce shine without feeling heavy. Dry or very dry skin can still use it but might want to pair products containing Nylon-611 with a richer moisturizer to avoid a tight feeling. The ingredient is considered non-sensitizing so most sensitive skin types can tolerate it, provided the overall formula is gentle.
Because Nylon-611 is a fully synthetic polymer made from plant-derived undecanoic acid and a lab-produced diamine, it contains no animal material which makes it acceptable to vegans and vegetarians.
The powder is not known to penetrate deeper layers of skin or enter the bloodstream, so there are no specific warnings for pregnant or breastfeeding women. That said, this is not medical advice and anyone who is pregnant or nursing should show any new skincare product to a healthcare professional before use just to be safe.
Nylon-611 does not increase photosensitivity and has no reported interactions with sun exposure, so it will not make skin more prone to sunburn.
Potential Side Effects/Adverse Reactions
Side effects and reactions to topical Nylon-611 vary from person to person. The points below list potential issues yet most users will not experience them when the ingredient is used at standard cosmetic levels.
- Mild skin dryness or tightness if used in very high concentrations
- Temporary irritation or redness in sensitive individuals
- Clogged pores if combined with heavy occlusive ingredients in extremely oily skin
- Respiratory irritation from inhaling loose powder during application
If any irritation or discomfort occurs stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1/5 – Nylon-611 is a breathable, inert powder that does not form a heavy film on skin, so it rarely blocks pores. Its particles sit on the surface and mainly absorb excess oil rather than trap it, which keeps the risk of breakouts low. Because the rating is just 1, Nylon-611 is generally suitable for acne-prone or breakout-prone skin. Those with severely congested skin may wish to monitor how their skin responds if the formula also contains richer waxes or butters.
Summary
Nylon-611 offers one standout function in cosmetics: oil absorption that delivers a soft matte finish and a smoother skin look. By soaking up sebum and sweat it helps makeup last longer, reduces shine and gives powders a silky glide. While not as famous as talc or silica, this ingredient has carved a steady niche in mattifying primers, setting powders and dry shampoos thanks to its lightweight feel and vegan origin. Safety data show it is non-sensitizing and essentially non-comedogenic, with side effects limited to rare dryness or irritation. Products containing Nylon-611 are considered low risk for most users, yet it is always smart to patch test any new formula to make sure it agrees with your skin.