What Is Low-Yellowing Epoxy and When Should You Use It?

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If you’re planning a resin-bound outdoor surface, choosing the right epoxy binder is key to long-term results. Low-yellowing epoxy helps surfaces retain their colour integrity, especially in outdoor settings exposed to sunlight and changing weather.

What Does Low-Yellowing Epoxy Mean?

Low-yellowing epoxy is formulated to resist the natural discolouration that can occur when standard epoxies are exposed to ultraviolet (UV) light over time. This matters most for coloured stones and decorative aggregates, as it helps preserve the original finish and keeps your surface looking fresh for longer. While no epoxy can remain entirely unchanged, low-yellowing blends are designed to slow visible fading and yellowing, making them more suitable for outdoor environments than standard indoor resins.

Where and How to Use Low-Yellowing Epoxy

Low-yellowing epoxy is recommended when installing permeable stone surfaces with coloured pebbles, granules, or natural aggregates. For example, when using resin kits like the Flowstone Complete Permeable Floor Kit, the guidance is clear: choose low-yellowing epoxy when working with coloured stones to maintain their tone and appearance. Application is straightforward, with clear instructions to help achieve a uniform, durable bond. For white stones, a non-yellowing polyurethane binder is typically advised instead.

When This Matters Most

If your surface will be in direct sunlight or you’re using light-toned or vibrant coloured stones, opting for a low-yellowing epoxy is particularly important. This choice helps reduce the risk of colour shifts, keeping outdoor patios, driveways, or decorative garden edges attractive for longer periods between maintenance.

Related products

• "Flowstone" – Complete Permeable Floor Kit with Pebbles and Resin

Related guides

• Which Permeable Resin Kits Offer Slip Resistance

Choosing a low-yellowing epoxy is a smart way to ensure your coloured stone resin surfaces retain their appeal. For more guidance on slip resistance and choosing the right resin binder, visit our main advice page on which permeable resin kits offer slip resistance.