Will the Resin Yellow or Fade Over Time?

How Resins Resist Yellowing and Fading

Many modern resin products incorporate UV filters or stabilisers to help slow down yellowing and maintain clarity. However, not all resins offer the same level of resistance. UV light, particularly in outdoor settings, can gradually cause standard epoxy to take on a yellowish tint. For example, white aggregates or lighter-coloured pebbles are especially sensitive to slight colour changes and require careful binder selection for lasting brightness.

Choosing the Right Resin for Colour Stability

If you want to avoid discolouration—especially with pale or white stones—a non-yellowing polyurethane resin is strongly recommended, as it offers greater long-term colour retention than regular epoxies. For decorative pebble or stone floors that use coloured granules, a low-yellowing epoxy binder may suffice, as any minor changes are masked by the aggregates.

A good example is the Flowstone permeable floor kit, which provides clear guidance on resin type for different aggregate colours and includes comprehensive instructions to help you achieve the ideal result.

When This Matters Most

• Outdoor surfaces exposed to full sun and the elements
• Floors and worktops in bright or south-facing rooms
• Projects using white, pale or colour-sensitive stones and pebbles

In such scenarios, taking the time to match your resin to your project’s needs avoids disappointment from gradual yellowing or faded hues.