Do Epoxy-based Acrylic Resins Yellow Over Time?

What Causes Yellowing in Epoxy-based Acrylic Resins?

Epoxy resins can yellow gradually with prolonged UV exposure. Standard formulas may develop a noticeable amber tint when subjected to direct sunlight, which can alter the clarity and appearance of resin surfaces. This is especially important for items such as jewellery or table coatings where transparency is desired for an attractive, professional finish.

Selecting UV-resistant Epoxy Resins

Modern epoxy-based acrylic resins are often formulated with UV filters to help limit yellowing. Products like Icrystal Clear Epoxy Resin are specifically developed to resist UV-induced discolouration, providing a longer-lasting clear finish. Similarly, Art Pro includes UV protection and is suitable for artists who demand durable, glass-like clarity for coasters, trays, or display pieces. Always check the product description for mentions of a UV filter or enhanced resistance if your project will see regular sunlight.

Practical Tips for Outdoor and Sunlit Applications

• Opt for resins labelled with UV-resistant or UV-filter claims for outdoor use.
• Minimise prolonged direct sunlight where possible; even UV-resistant resins may slowly yellow over years.
• Consider using topcoats or protective varnishes that offer additional UV shielding for exposed surfaces.