What Is Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer?
Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer is a hybrid molecule that links water-loving polyethylene glycol units to dimethicone, a well known silicone, and to dimer dilinoleate, a fatty acid derivative usually sourced from plant oils such as safflower or soybean. By combining silicone with a natural-oil-based component, chemists created an ingredient that offers the silky slip of dimethicone along with the nurturing feel of fatty esters. The material was developed in the early 2000s when formulators were searching for lighter, more versatile conditioning agents that rinse cleanly yet still leave hair soft. It is produced through a controlled polymerization process where the Peg-10 dimethicone backbone is reacted with dilinoleic acid dimers, forming a stable copolymer that disperses easily in water-based and oil-based systems. You will most often spot it in shampoos, rinse-out and leave-in conditioners, hair masks, color-protecting treatments, anti-frizz serums, styling creams and even some lightweight finishing sprays.
Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer’s Cosmetic Benefits/Uses
In hair care formulas this ingredient serves one main role: hair conditioning. It forms a thin, flexible film over each strand, smoothing raised cuticles so hair feels softer and looks shinier. The film helps detangle wet hair, cuts down on breakage during combing and makes dry hair less prone to static and flyaways. Because the molecule is part silicone and part fatty acid it conditions without leaving heavy buildup, allowing hair to stay light and bouncy between washes.
Who Can Use Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer
This ingredient is considered friendly for all scalp and hair types including dry, normal and oily. Its lightweight film does not trap much oil or sweat so even those prone to clogged follicles or an easily weighed-down style generally tolerate it well. Sensitive scalps benefit from the silky protective coating that can reduce friction against the skin yet the molecule itself has a very low irritation profile.
Because both the silicone segment and the dilinoleic acid segment originate from minerals and plant oils, products made with this copolymer are usually suitable for vegans and vegetarians. Still, sourcing practices vary by manufacturer so anyone following a strict lifestyle should confirm that no animal-derived processing aids were used.
The copolymer sits on the surface of hair and skin rather than penetrating, so systemic exposure is expected to be negligible. On that basis it is generally viewed as safe for use during pregnancy and breastfeeding. This is not medical advice and pregnant or nursing individuals should review any product with their doctor to be on the safe side.
Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer is not known to cause photosensitivity and it will not interfere with sunscreen performance. It is also odorless, colorless and non-volatile making it a good option for people who are sensitive to strong scents or fumes in hair products.
Potential Side Effects/Adverse Reactions
Reactions to topical Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer vary from person to person. The points below outline potential side effects yet most users will not encounter them when the ingredient is formulated and used correctly.
- Mild scalp or skin irritation
- Rare allergic contact dermatitis presenting as redness or itching
- Weighed-down or greasy feel if an excessive amount of product is applied
- Temporary eye discomfort if the product accidentally gets into the eyes
- Possible reduced penetration of leave-on actives applied immediately after due to the occlusive film
If any adverse reaction occurs stop using the product and seek advice from a healthcare professional or pharmacist.
Comedogenic Rating
Rating: 1 out of 5. Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer forms a lightweight, breathable film that sits on the surface rather than seeping into pores, similar to other low-viscosity silicones. The dilinoleate portion is a bulky ester that further reduces the likelihood of pore blockage. Because the polymer rinses off cleanly with normal shampooing or cleansing it is unlikely to contribute to blackheads or whiteheads. Overall the ingredient is considered suitable for acne-prone or breakout-prone skin and scalp. Those using very heavy formulations or layering multiple occlusive products may want to monitor for congestion, but issues are rare.
Summary
Bis-Peg-10 Dimethicone/Dimer Dilinoleate Copolymer is a hybrid silicone-fatty acid polymer that conditions hair by smoothing cuticles, reducing friction and adding light shine. Its unique structure delivers the slip of dimethicone while avoiding greasy buildup thanks to the plant-derived dilinoleate segment. Although not as famous as classic dimethicone or newer bonding actives, it appears in a growing number of shampoos, conditioners and leave-ins because formulators value its balanced feel.
Current safety data show a low irritation and sensitization profile, minimal systemic absorption and virtually no comedogenicity, making it a low-risk choice for most users. As with any new cosmetic ingredient it is wise to perform a quick patch test when first trying products that contain it, just to be sure your skin or scalp agrees.