UV light causes yellowing and other degradative effects to DIY Epoxy resin. Stabilization additives are therefore essential to help mediate the damage. The UV stabilizer helps to reduce yellowing, maintaining the gloss and resin decay caused by the sun. It is important to note that a UV stabilizer only delays yellowing in resins. The DIY Epoxy Resin has a HALS (hindered amine light stabilizer) to ensure your epoxy projects will are protected from the sun.