Our take
Is Trimethylpentanediol/Adipic Acid Copolymer a Good Ingredient?
It rates Good because it consistently forms a flexible, durable film that boosts wear and uniformity in makeup. Performance is strong, but clinical data for skin benefits are limited, and some users may find film-formers feel occlusive if not removed well, which holds it at Good.
What it does
Skin Benefits
Helps makeup stay put by improving grip and resisting smudging, and promotes a smoother, more even look once the product sets.
Where you'll find it
Uses in Skincare & Cosmetics
Common in long-wear liquid foundations, eyeliners, and mascaras for durability, and also found in setting sprays and gel-cream primers to boost hold.
Before you use it
Low likelihood of irritation for most users. Can feel tight or contribute to buildup if layered without thorough cleansing. Avoid getting into eyes if sensitive.
Products with Trimethylpentanediol/Adipic Acid Copolymer