What it is
Lauryl Methacrylate/Sodium Methacrylate Crosspolymer is a synthetic crosslinked polymer combining lipophilic lauryl methacrylate units with hydrophilic sodium methacrylate units. This balance lets it form a flexible film and help structure water-rich, gel-type formulas while imparting a fresh, lightweight feel. It is frequently used in essence- and gel-style sunscreens to give a smooth, non-greasy finish.
Safety & warnings
As a high-molecular-weight crosslinked polymer it is generally well tolerated and has low irritation potential, staying on the skin surface rather than penetrating. It is not a fragrance allergen and is not a comedogenic oil.
Origin & sourcing
Synthetic. It is produced by polymerizing and crosslinking lauryl methacrylate and sodium methacrylate monomers.
Questions everyone asks
Why is this polymer common in watery gel sunscreens?
Its mix of oil-loving and water-loving units helps structure water-rich formulas and gives a fresh, lightweight, non-greasy feel.
What is its main function?
It works mainly as a film former and viscosity controller that helps the formula apply smoothly and set into an even layer.