The light stabilizer mainly protects the physical properties such as gloss and tensile strength that will be damaged by free radicals, and protects the color.

The combination of light stabilizer and ultraviolet absorber can get a huge synergistic effect, so it is usually used in combination.

The most important thing to choose hindered amine is to know the material, additives and thickness of the application. Larger hindered amines are recommended for thin parts applications, and small molecules are recommended for thick parts applications.