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Non-yellowing polyurethane is a specialist resin often used in outdoor flooring projects to preserve the natural brightness of white stones and pebbles. It plays a crucial role in maintaining surface aesthetics over time, especially where exposure to sunlight and weather is a concern.
What Is Non-Yellowing Polyurethane?
Non-yellowing polyurethane is a two-component binder designed to resist the discolouration that can occur when resins are exposed to sunlight. Unlike standard polyurethane or some epoxies, it stays clear and does not develop a yellow tint, making it the preferred choice when working with white or very light aggregates in resin bound gravel applications.
This form of resin is particularly valued for creating decorative and permeable outdoor surfaces, such as driveways, paths, and patios, where appearance needs to be maintained for years.
Choosing the Right Binder for Your Project
When selecting a resin binder, it’s important to match the resin type to the aggregate colour. For white stones, a non-yellowing polyurethane like Polirock is strongly recommended, as it stays clear under sunlight and prevents dulling or yellowing of the surface. For coloured or dark aggregates, a UV-stable epoxy binder such as “Trasparente” is suitable, supporting a vibrant, glossy finish that endures heavy traffic and weathering.
- For projects using white or light stones, always choose non-yellowing polyurethane.
- For coloured pebbles or grits, opt for a clear epoxy binder with UV resistance.
- Follow mixing and application instructions to ensure the resin fully encapsulates the stones for lasting results.
When Does Non-Yellowing Polyurethane Matter Most?
This type of binder is especially important for areas that receive direct sunlight or when a pristine, clean appearance is essential—such as modern driveways, public courtyards, or decorative garden paths. It’s also preferred where anti-slip performance and outdoor durability are key requirements.
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For any project involving resin bound gravel, choosing the correct resin binder ensures both functionality and a fresh look that stands the test of time. Learn more about surface choices and water-permeable flooring on our main guide: How does permeable resin bound gravel work?