Why epoxy turns yellow — and how to keep it clear
If an epoxy floor yellows or ambers, it's usually not damage — it's the nature of raw epoxy in UV light. The good news: it's completely avoidable with the right top coat. Here's the science and the solution.
The chemistry of ambering
Standard 'aromatic' epoxy reacts to UV light and slowly turns amber or yellow. It doesn't weaken the floor, but it changes the color — especially noticeable on whites, grays and clear coats near windows or outdoors.
The fix: a UV-stable top coat
Sealing the floor with an aliphatic top coat — polyaspartic or polyurethane — blocks the ambering. These stay clear in sunlight for years, which is why every sun-exposed floor we build gets a UV-stable top coat.
Indoors vs outdoors
A shaded interior may never yellow noticeably. But in sunny South Florida — near big windows, in carports, on patios and pool decks — a UV-stable top coat isn't optional if you want the color to hold.