Polypropylsilsesquioxane ek silicone-based resin hai jo cosmetic products mein use hota hai — yeh skin pe ek smooth, water-resistant film banata hai jisse product achhe se spread hota hai, lamba time tak tika rehta hai, aur sunscreen ya color cosmetics ka wear improve hota hai. Yeh non-greasy feel deta hai aur product ki texture ko better banata hai.