Why Does Epoxy Turn Yellow in the Bottle? (And How to Fix It)

If you’ve ever opened a bottle of epoxy resin that used to be crystal clear and found it’s gone a little golden, you’re not alone. Yellowing is a natural part of the resin’s life cycle, but it doesn’t have to be the end of the line.
Let’s break down why epoxy yellows, what’s happening at the molecular level, and how you can rescue your resin (and your projects) with the right tools.

The Science: What Causes Yellowing in Epoxy?

Yellowing in epoxy doesn’t happen by accident — it’s all chemistry. The key culprits are:

UV Light
Ultraviolet light breaks down the chemical bonds in resin over time. Think of it like sunburn for your epoxy — UV rays cause oxidation, leading to amber or yellow tones. Even indoor lighting (like fluorescent bulbs) can contribute.

Oxygen Exposure
Once your resin has been opened, oxygen sneaks in and begins to oxidize the resin. This process slowly shifts the color from clear to a warm hue, especially in cheaper formulas that lack stabilizers.

Heat + Time
Warm storage conditions (think garages, shipping warehouses, or sunlit shelves) can accelerate yellowing. Even unopened bottles can start to change color if left in high temps for too long.

Formulation Quality
Not all epoxies are created equal. Many mass-produced brands skip on UV stabilizers or HALS (Hindered Amine Light Stabilizers) to cut costs. These additives slow the yellowing process — so when they’re missing, discoloration hits fast.

What Yellowing Doesn’t Mean

Don’t panic — yellowing doesn’t mean your resin has gone bad or is unsafe. It can still cure just fine. But visually? It’s going to affect your finish, especially in projects that need a bright white or glass-clear look.
That’s why so many makers look for a way to neutralize it — without throwing away good product.

How to Fix Yellowed Epoxy Resin

That’s where our game-changing additive comes in:

Color Correct+ UV+ Dye
We created this formula to help save your resin (and your wallet). Here’s how it works:

Color-Correcting Technology
Like purple shampoo for blonde hair, the violet pigment in Color Correct+ balances out yellow tones in resin — making it look clear again. It’s literal color theory at work.

Built-In UV Protection
It’s more than just dye — our formula includes UV inhibitors, UV blockers, and HALS to help stop further yellowing, even after you pour.

Super Concentrated
Just a few pumps per batch is all you need. It works with any brand of epoxy, and a little goes a long way.

How to Use It:

• Mix your epoxy as usual

• Add 4–6 pumps of Color Correct+ per 8 oz

• Stir well

• Pour and enjoy the clarity

Pro Tip: You Might Not Need This If You Use Our Resin

Here’s the kicker — Artistry Epoxy already comes loaded with UV+ protection in every bottle. That means in most cases, you won’t need to add anything to keep it crystal clear. But if you’re working with older resin or a brand without those stabilizers? Color Correct+ is your resin’s best friend.

Final Thoughts

Epoxy yellowing is frustrating, but it doesn’t have to be final.
With the right understanding — and the right tools — you can bring your resin back to life and keep on creating with confidence.

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