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Non Yellowing Epoxy Stickers

UV light is to blame for changes to cured epoxy resin over time. When UV light hits the resin—either directly or indirectly—it degrades the polymers. Although this degradation from UV light is a natural process (UV light is typically always harmful to everything on earth over time), it causes...

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UV light is to blame for changes to cured epoxy resin over time. When UV light hits the resin—either directly or indirectly—it degrades the polymers. Although this degradation from UV light is a natural process (UV light is typically always harmful to everything on earth over time), it causes observable, undesirable, aesthetically displeasing characteristics.

In other words, yellowing is still inevitable with a UV stabilizer alone. Yellowing first presents as a light tone all over, then progressively darkens until it reaches a dark brownish-yellow hue. Yellowing will be accelerated with exposure to UV light.


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How To Protect Your Artwork Against Yellowing

UV stabilizers are not enough to prevent yellowing in epoxy resin. If you are coating pieces of art—or anything creative, special and important—then you need a product that contains an additive called 'HALS', in addition to a UV stabilizer. HALS stands for Hindered Amine Light Stabilizer. It's job in the formula is solely to prevent yellowing. How does it do this?  HALS scavenges radicals that are produced with UV light exposure, thus interrupting the degradation cycle that resin is naturally subject to. For this reason, HALS is extremely efficient at preventing yellowing. It's protection abilities has been demonstrated time and again since it came into existence in the 1960s. A UV stabilizer is still necessary to protect against the other problems that result from UV light degradation, however HALS is the number one agent that works to prevent yellowing.

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