Yellowing in Casting Resins: How Resistant Are Deep Pour Resins Over Time?

Why Does Resin Yellow?

Yellowing in epoxy resins is typically caused by prolonged exposure to ultraviolet (UV) light. Over time, standard resins can react to sunlight or artificial lighting, eventually resulting in a noticeable colour change. Deep pour projects, such as river tables and thick artistic castings, are especially prone to this effect due to their larger surfaces and thicker sections.

Advances in Yellowing Resistance

Modern deep pour resins such as Epoxytable 10-Ten are formulated specifically with UV stabilisers to combat yellowing. Thanks to these enhancements, clear resins for thick casting applications may stay transparent and resist yellowing for several years. For example, Epoxytable 10-Ten offers non-yellowing performance guaranteed for five years under typical indoor use.

• Choose resins advertised with UV stabilisers or anti-yellowing formulas for best results.
• For outdoor or high-UV environments, consider additional protective measures such as UV-resistant clear coats.

When Yellowing Resistance Matters Most

Long-term clarity is especially important for statement pieces, functional furniture like tables, and decorative items displayed in naturally lit rooms. The right resin can safeguard your hard work from discolouration, keeping it looking brilliant even in challenging conditions.