Stabilizers are crucial for protecting plastics from degradation caused by exposure to heat, light, and oxygen. Without stabilizers, plastics can become brittle or discolored, resulting in diminished mechanical performance and shorter service life. UV stabilizers, for example, are essential for outdoor applications where exposure to sunlight can be detrimental. Metal stearates and chlorinated paraffins are often added to stave off thermal degradation during manufacturing processes, ensuring that the plastic maintains its integrity during production and usage.