What it is
Hydrogenated Polycyclopentadiene is a hydrogenated hydrocarbon resin made by polymerizing cyclopentadiene and then saturating the resulting polymer with hydrogen. In cosmetics and sunscreens it acts as a film former that helps deposit an even, cohesive layer and can improve the wear and feel of the product. The hydrogenation step improves the resin's color stability and resistance to oxidation.
Safety & warnings
As an inert, high-molecular-weight hydrocarbon resin, it is generally well tolerated in topical use and is not a recognized fragrance allergen.
Origin & sourcing
Synthetic hydrocarbon resin produced by polymerizing cyclopentadiene followed by hydrogenation.
Questions everyone asks
What does this resin do in a sunscreen?
It is a film former that helps lay down an even, cohesive layer and can improve how the product wears and feels.
Is it natural or synthetic?
It is a synthetic hydrocarbon resin made by polymerizing cyclopentadiene and then hydrogenating it.