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If you’re considering resin-bound outdoor flooring, you may have come across the term “non-yellowing polyurethane”. Choosing the right resin binder can make a noticeable difference in how your surface looks over time, especially in the UK’s variable weather.
What Is Non-Yellowing Polyurethane?
Non-yellowing polyurethane is a type of resin binder formulated to maintain its clarity and resist colour change when exposed to sunlight. This is especially important for outdoor applications, as standard polyurethane or epoxy resins can gradually turn yellow or discolour under UV exposure.
Where and Why Should You Use It?
Non-yellowing polyurethane is recommended when you want to preserve the original appearance of light or white stone aggregates—such as white decorative pebbles or marble—in your surface. It is less crucial for darker or coloured stones, where low-yellowing epoxy may be sufficient. For driveways, patios, and pathways, using a non-yellowing binder ensures that your surface continues looking bright and fresh despite frequent sun and outdoor exposure.
If you’re using a kit like the Flowstone Complete Permeable Floor Kit, expert guidance will help you choose the correct resin for your chosen aggregate.
When This Matters Most
- White or light-coloured aggregates: Maintains a crisp, true colour for years.
- Areas in direct sunlight: Helps outdoor surfaces stay attractive and consistent.
- Long-term installations: Reduces maintenance and the need for premature resurfacing.
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Selecting a non-yellowing polyurethane binder for your resin-bound projects helps ensure your paving remains visually appealing. For more details on creating durable and attractive permeable surfaces, see our resources on heavy-traffic paving solutions.