 What is HALS and UV stabilization? HALS and UV stabilization are additives that we put into our proprietary artrism formula to keep it clear and beautiful looking for the long term. It's a well-known fact that UV light is damaging and epoxy resins are not immune to that. In resin it shows up as gloss loss, chalking, cracking, delamination and of course yellowing and there's nothing worse than having a beautiful piece of art ruined by epoxy resin that turns yellow. Art resin incorporates two light stabilizers, the UV light stabilizer and the HALS or hindered amine light stabilizer. The UV stabilizer is in there to take care of most of the damaging effects that happens from UV light, however it doesn't do a great job protecting against yellowing. The hindered amine light stabilizer is in there to target the yellowing because it interrupts the yellowing at the outset making it much more unlikely to happen. So double the light stabilizers equals better protection for your art.