What it is
Polyacrylamide is a high-molecular-weight polymer made from acrylamide monomers. In skincare and sunscreen formulas it forms a thin, cohesive film on the skin, thickens the water phase, and helps keep emulsions stable, which can improve the wear and even distribution of UV filters. It is usually supplied as part of a thickening or emulsifying system rather than as a standalone ingredient.
Safety & warnings
The finished polymer is considered safe and non-sensitizing in cosmetic use. The main historical concern relates to trace residual acrylamide monomer, which is controlled to low limits by manufacturers and regulators; the polymer itself is large and does not penetrate skin. It is not associated with notable comedogenicity.
Origin & sourcing
Synthetic; produced by polymerizing acrylamide monomers.
Questions everyone asks
What does polyacrylamide do in sunscreen?
It acts as a film former and thickener, helping the product set into an even layer, stabilizing the emulsion, and supporting consistent distribution of UV filters.
Is polyacrylamide the same as acrylamide?
No. Polyacrylamide is a large, stable polymer used in cosmetics; acrylamide is the small starting monomer, and residual amounts of it are kept to strict low limits.