What Is Bis-C10-28 Alkyl Dimethicone?
Bis-C10-28 Alkyl Dimethicone is a type of silicone, part of the siloxane polymer family. It is created by linking dimethicone, a well-known cosmetic silicone, with long chains of synthetic fatty alcohols that range from 10 to 28 carbon atoms. These chains give the ingredient a soft, velvety feel and make it more compatible with both oils and silicones. The raw materials come from refined silica for the silicone portion and plant-derived or lab-made fatty alcohols for the alkyl chains. To produce it, chemists bond the two parts through a controlled reaction that yields a stable, high-molecular-weight fluid.
Silicones first entered beauty products in the 1950s for their smooth glide and water-resistant finish. Over time, formulators wanted versions that felt lighter and blended well with natural oils, which led to hybrid molecules like Bis-C10-28 Alkyl Dimethicone. Its balanced structure lets it spread easily without the heavy, greasy afterfeel of older silicones.
You will spot this ingredient in a variety of products: lightweight face and body moisturizers, hydrating masks, smoothing primers, sunscreens, color cosmetics like foundations or BB creams and leave-on hair treatments that tame frizz while adding subtle shine. Because it helps bind oily and watery parts of a formula, it is especially useful in modern, fast-absorbing skincare.
Bis-C10-28 Alkyl Dimethicone’s Cosmetic Benefits/Uses
This versatile silicone adds multiple benefits to beauty formulas, making textures more pleasant and results more noticeable.
- Binding – Acts as a gentle glue that keeps oil and water ingredients evenly mixed so the product stays stable over time and feels consistent from the first pump to the last
- Skin Conditioning – Forms a soft, breathable film on the skin that smooths rough patches, boosts slip during application and locks in moisture for a supple, silky finish
Who Can Use Bis-C10-28 Alkyl Dimethicone
This silky silicone is generally well tolerated by all skin types including dry, normal, combination and even most oily or sensitive complexions because it sits on top of the skin rather than penetrating deeply. Exceptionally acne prone users who react badly to any occlusive film may prefer lighter polymers but in most cases the ingredient’s breathable finish will not worsen breakouts.
Bis-C10-28 Alkyl Dimethicone is produced from silica and synthetic or plant based fatty alcohols, with no animal derived substances involved, so it is suitable for vegans and vegetarians.
No research suggests a risk for those who are pregnant or breastfeeding when the ingredient is applied topically in cosmetic amounts. This is not medical advice and anyone expecting or nursing should check with a doctor before adding new products just to be safe.
The molecule does not make skin more sensitive to the sun and can actually improve the wear of sunscreen by forming a light water-resistant layer.
Potential Side Effects/Adverse Reactions
Responses to Bis-C10-28 Alkyl Dimethicone can vary from person to person. The points below outline possible, though unlikely, reactions assuming the ingredient has been correctly formulated and used as directed.
- Mild skin irritation such as redness or itching in very sensitive individuals
- Rare allergic contact dermatitis for those with a specific silicone sensitivity
- Temporary clogged pores or small comedones in users extremely prone to congestion
- Build-up on hair shafts leading to dullness if a shampoo containing strong cleansing agents is not used periodically
If you notice any discomfort or unexpected change while using a product containing this ingredient stop use and consult a qualified healthcare professional.
Comedogenic Rating
Bis-C10-28 Alkyl Dimethicone scores a 1 out of 5 on the comedogenic scale. Its high molecular weight keeps it on the skin surface where it acts as a light, semi-occlusive film rather than sinking into pores. This structure makes it far less likely to trap sebum compared with heavier mineral oils or waxes. Most acne-prone users can use the ingredient without noticing extra breakouts, although exceptionally congestion-prone individuals might still prefer to limit heavy layering. Formulation matters too: pairing the silicone with rich butters or highly occlusive oils can raise the overall pore-clogging potential of the finished product.
Summary
Bis-C10-28 Alkyl Dimethicone is a hybrid silicone that binds oil and water phases while conditioning skin by forming a silky, moisture-locking film. Its balanced alkyl-silicone structure gives formulas a smooth glide and a non-greasy afterfeel, which is why it shows up in modern moisturizers, primers, sunscreens and lightweight hair serums. Though not as famous as classic dimethicone, it is gaining traction among formulators who want a softer touch and better oil compatibility.
The ingredient is considered low risk for irritation or allergies, carries a very low comedogenic rating and is vegan friendly. In normal cosmetic concentrations it is safe for daily use, yet it is always smart to patch test any new product to rule out personal sensitivities.