What Is Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate?
Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate is a specialty silicone polymer created by linking a modified dimethicone backbone with a cycloaliphatic di-isocyanate known as IPDI. The result is a large, flexible molecule that can form an invisible film when spread on skin or hair. Its raw materials originate from silicone-based oils and petrochemical intermediates that are reacted under controlled heat and catalysts in a closed reactor. After the polymer chain reaches the right length it is neutralized, purified and sometimes blended with a carrier fluid to make it easy to add to cosmetic formulas.
This ingredient was developed in the early 2000s as chemists searched for lighter, more breathable alternatives to older silicone gums. Its ability to form a durable yet weightless film quickly made it attractive for cosmetics where a smooth, long-lasting finish is desired. Today it appears in a range of products including leave-on hair treatments, long-wear foundations, primers, sunscreens, anti-aging serums, sheet masks and certain waterproof eye or lip products.
Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate’s Cosmetic Benefits/Uses
The primary role of this ingredient in cosmetics is as a film former. When applied, it lays down a thin uniform layer that:
• Locks in moisture without feeling greasy
• Smooths the skin surface so makeup glides on evenly
• Helps pigments and UV filters stay in place longer resisting sweat or water
• Adds a soft, non-tacky finish that can blur the look of fine lines
Who Can Use Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate
This breathable silicone film former is generally well tolerated by most skin types including dry, oily and combination. Its lightweight feel makes it suitable even for sensitive or redness-prone skin because it does not penetrate deeply or disrupt the skin barrier. People with very acne-prone skin should still monitor how it performs for them since any film former has the theoretical potential to trap existing sebum and debris.
The polymer is synthesized entirely from mineral-derived and silicone-based feedstocks with no animal ingredients or by-products. It is therefore considered suitable for vegans and vegetarians.
Current safety data show no reproductive or developmental toxicity for topical use, so products containing this ingredient are not automatically off limits for women who are pregnant or breastfeeding. That said, this is not medical advice and expectant or nursing mothers should run any skincare products past a qualified physician to be on the safe side.
The molecule does not absorb UV light or make the skin more sensitive to sunlight, so it is not linked to photosensitivity. It can actually help stabilize sunscreens by holding UV filters in place.
No other special usage restrictions are noted, and it plays well with common cosmetic actives such as retinoids, peptides and niacinamide.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate can vary from person to person. The following is a list of potential side effects that are considered uncommon. Assuming the ingredient has been formulated correctly most users will not experience them.
- Mild skin irritation such as redness or itching
- Temporary clogged pores or breakouts in very acne-prone individuals
- Contact dermatitis in those with a specific silicone allergy
- Build-up on hair shafts leading to dullness if used in leave-on hair products without periodic clarifying
If you notice any persistent discomfort or reaction discontinue use and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
This large silicone-based polymer sits on the surface rather than sinking into pores, so it rarely mixes with sebum or dead cells in a way that sparks blockages. It also has a lightweight, breathable feel compared with heavier silicone gums. For these reasons formulators generally consider it to have very low clogging potential, though any film former can trap debris if layered over already congested skin.
Most people who are prone to acne or breakouts find this ingredient acceptable when used in well-balanced formulas.
If the product pairs this polymer with heavy oils or waxes the overall formula could still lean more comedogenic, so always judge the full ingredient list, not just one component.
Summary
Bis-Hydroxyethoxypropyl Dimethicone/Ipdi Copolymer Ethylcarbamate is mainly a film former that locks in moisture, smooths texture, boosts pigment grip and helps cosmetics stay put through sweat or water. It performs these jobs by creating an ultrathin flexible veil that adheres evenly to skin or hair without a greasy feel.
While not as famous as dimethicone or cyclopentasiloxane, this newer hybrid silicone has carved out a niche in long-wear makeup, sunscreens and high-performance hair serums where durability with lightness is key.
Safety data show it is non-sensitizing, non-phototoxic and virtually inert for topical use, making it a low-risk choice for most consumers. As with any new skincare or makeup item it is still smart to patch test first to confirm personal compatibility.