Can I use PEG-20 Glyceryl Triisostearate with Polydiethyleneglycol Adipate/IPDI Copolymer?
Works well together
PEG-20 Glyceryl Triisostearate and Polydiethyleneglycol Adipate/IPDI Copolymer are generally compatible and can be layered in the same routine. As always, introduce one new active at a time and watch how your skin responds.
PEG-20 Glyceryl TriisostearateSurfactant
- ✓Primary self-emulsifying surfactant in cleansing balms: forms an oil-continuous phase that converts to a milky emulsion upon contact with water, allowing the balm to rinse away while carrying dissolved sebum and makeup
- ✓Provides elegant, non-stripping cleansing — the anhydrous oil phase lifts lipophilic impurities without requiring a separate rinse-off micellar step
- ✓HLB value suited for creating the water-in-oil → oil-in-water phase inversion characteristic of cleansing balms (similar to PEG-20 Glyceryl Laurate but optimized for richer/more emollient textures)
- ⚠Ethoxylated ingredient — theoretical trace contamination with 1,4-dioxane (EU-regulated); cosmetic-grade material meets purity standards
- ⚠PEG-based surfactants can disrupt the stratum corneum barrier if used in rinse-off products that are left on for extended periods; standard use in cleansing balms is safe
- ✓Polyurethane copolymer synthesized from diethylene glycol adipate and isophorone diisocyanate (IPDI) that provides film-forming and texture-modifying properties in cleansing balm formulations
- ✓Contributes to the 'bouncy' or gel-like texture of cleansing balms without relying on waxes alone, allowing softer, easier-to-scoop textures
- ✓Non-stripping on skin — the polymer resides in the oil phase and rinses away with the emulsifier upon water contact
