What You Need to Know About Yellowing Epoxy Resin

Most contractors and floor owners feel frustration trying preserve the allure of epoxy floors when yellowing sets in. Epoxy resins, specifically non-polyaspartic resins, will eventually develop yellow hue when exposed to UV. But it doesn't have to be this way!

Our comprehensive guide is going to help you stave off the inevitable! From the intricate reasons behind why epoxy turns yellow, to effective solutions that'll help you prevent it.

Understand Why Epoxy Turns Yellow

Sunlight & UV Radiation

Studies on epoxy resin reveal that sunlight exposure changes the chemical structure of the resin. Because of this, your resin will gradually turn yellow over time. Specifically, the ultraviolet (UV) component of sunlight induces a process known as photodegradation.

In this process, UV photons break the molecular bonds within the epoxy resin, causing a gradual breakdown of the polymer structure. This breakdown is what makes your epoxy start to look yellow over time, even in low-light environments. Our industry's focus on the science behind this has led to developments in resin technology that actually fights back specifically against this breakdown!

Veterans of the industry have the experience to know that it's not just these external factors that'll turn resin yellow. It also comes down to your resource choice. The choice of hardeners significantly contributes to or prevents yellowing. A low quality resin and hardener mix will begin to yellow much sooner than a strong resin. Especially compared against polyaspartic!

 

Best Methods to Prevent Epoxy Resin Yellowing

There are epoxy resins resistant to UV rays, as recommended by experts, that act as a protective shield against yellowing. Any polyaspartic resin you pick will have ultraviolet protection. Resin resources like our UV-resistant epoxy kit are specifically designed to shield the epoxy from the harmful effects of sunlight.

 

The combination of proper sealing techniques & high quality resins, as outlined in research of industry best practices, is one of your best lines of defense. Proper sealing during installation creates a barrier that delays the onset of yellowing. It won't completely solve the issue on its own, but the epoxy will maintain its original color (or lack thereof) for an extended period.

Industry experts often underscore the importance of managing temperature and humidity during epoxy installation. You'll need an optimal environment for epoxy application to prevent yellowing. If the epoxy cures and sets under favorable conditions, it has a better chance of fighting that chemical breakdown.

While epoxy yellowing is a near-inevitable challenge, you can fight back! Backed by analysis of the industry, and of resins, this guide not only uncovers the causes of yellowing but also provides actionable strategies for effective prevention. A holistic approach, from installation to maintenance and care, ensures that epoxy floors remain vibrant and appealing for its lifetime!