Light stabilizer 622 is a polymeric high molecular weight hindered amine light stabilizer, with low volatility, migration resistance, low alkalinity and high temperature resistance. It has synergetic effect with antioxidants and UV absorbers.

Light stabilizer 611 is a kind of compound hindered amine light stabilizer, with low alkaline, low volatility, migration resistance, and high temperature resistance. It has good compatibility with most of polymers.