Hydrogenated Polycyclopentadiene

Hydrogenated Polycyclopentadiene is a synthetic hydrocarbon resin used in small amounts in mascara, lip products, and depilatory waxes to give a formula body and hold. It is described as chemically inert with negligible skin absorption, and it falls within a CIR review of related polyene and hydrocarbon polymers, though published ingredient specific irritation or sensitization data is thin compared to more heavily studied cosmetic polymers.

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.