What Is Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer?
Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer is a lab made ingredient that links three well known materials: silicone, polyethylene glycol and polypropylene glycol. The result is a block copolymer that blends the smooth feel of silicones with the water loving nature of glycols. The numbers in its name tell how many repeating units of each part are present on average, helping chemists tune its texture and performance.
This hybrid material first appeared in the early 2000s when brands were looking for lightweight alternatives to thick oily films. By grafting silicone to water soluble chains, formulators created a molecule that spreads quickly, locks in moisture and leaves a soft finish without greasy buildup. Production starts with medical grade PEG and PPG, which are reacted with isobutyl groups then connected to dimethicone under controlled heat and catalysts. Each batch is purified so the final copolymer is clear, low odor and stable.
You can spot Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer in a wide range of leave on and rinse off items. It shows up in sheet masks, lightweight moisturizers, makeup primers, anti aging serums, hair smoothing creams and even sprayable sunscreens. Whenever a formula needs an invisible breathable film that also pulls in moisture, this multitasker is a popular choice.
Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer’s Cosmetic Benefits/Uses
This ingredient earns its place on labels thanks to two key functions that boost how a product feels and performs on skin or hair.
- Film forming: Creates a thin flexible shield on the surface that helps lock in active ingredients, reduce water loss and improve the wear time of makeup or sunscreen. The film feels silky instead of sticky so it suits daily use.
- Humectant: Attracts and holds water from the environment into the upper skin layers, delivering a quick shot of hydration and leaving skin smoother and plumper.
Who Can Use Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer
This ingredient suits most skin types, including dry, normal and combination skin, because it hydrates without leaving a greasy film. Oily or very acne prone users can usually tolerate it too, though those who react poorly to silicones in general may prefer to monitor how their skin behaves when it is layered with other occlusive agents.
Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer is made entirely from synthetic building blocks, so it is considered suitable for both vegans and vegetarians; no animal derived materials or by-products are used during its manufacture.
Current research shows no specific safety concerns for topical use during pregnancy or breastfeeding. That said, this is not medical advice and anyone who is pregnant or nursing should run any skincare products they use past a qualified healthcare provider to be on the safe side.
The molecule itself is not known to increase photosensitivity, so it will not make skin more prone to sunburn. Still, daily sunscreen is recommended whenever products are used in daytime routines.
Because the copolymer forms a breathable yet lasting film, it can enhance the wear time of other actives it is paired with. Users applying potent ingredients like retinoids or exfoliating acids should keep this in mind, as the extended contact time may intensify the effects of those actives.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer can vary from person to person. The following is a list of potential side effects, but they are uncommon and most users will not experience them when the ingredient is used correctly in a well formulated product.
- Mild skin irritation, usually presenting as slight redness or itching that resolves after removal
- Allergic contact dermatitis in individuals who are sensitive to silicones or glycol derivatives
- Temporary feeling of heaviness or occlusion if layered with multiple silicone rich products
- Rare clogged pores or comedones in those who are extremely acne prone and sensitive to film formers
If any negative side effect occurs stop using the product immediately and seek advice from a medical professional or dermatologist.
Comedogenic Rating
Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer scores a 1 on the 0-5 comedogenic scale. Its silicone backbone gives it a silky film that generally sits on top of the skin rather than sinking into pores, while the PEG and PPG segments improve water solubility and rinse-off. Together these features make it far less likely to clog pores compared with heavier silicones or pure oils. Most people prone to acne can use it without a flare-up, though extremely sensitive or occlusive-averse users might still prefer lighter formulas. Because the molecule is a large polymer it is unlikely to penetrate deeply, further lowering clogging risk. Formulas that combine this copolymer with heavy waxes or butters could raise the overall comedogenic load, so product context matters.
Summary
Bis-Isobutyl Peg-24/Ppg-7/Dimethicone Copolymer is a lab crafted hybrid that excels at two jobs: forming a breathable, flexible film and pulling moisture into the skin. The silicone segment lays down a smooth protective layer that locks in actives and boosts wear time, while the PEG/PPG chains attract water to keep skin hydrated and plump. Its lightweight touch makes it popular in modern moisturizers, primers, sunscreens and even hair care, though it remains more of a supporting actor than a headline ingredient.
Safety profiles are favorable, with low irritation reports and a very low comedogenic rating, but individual sensitivities can vary. As with any new cosmetic, it is wise to patch test a product containing this copolymer before committing to full-face or daily use.