We use one of the best UV Inhibitors available in our epoxy (HALS) to protect from yellowing over time.
HINDERED AMINE LIGHT
One of the most important classes of antioxidant for long-term heat protection of polymers are the so called hindered amine light stabilizers (HALS) which are very effective inhibitors against free radical induced degradation of polymers at low and medium temperatures. This class of amine stabilizers is based on 2,2,6,6-tetramethyl-piperidine derivatives. They are often employed as light stabilizers, particularly for olefins which explains their naming.