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Non-yellowing polyurethane is a key ingredient for resin bound gravel and decorative outdoor floors, helping preserve the appearance of your surfaces over time. If you want to maintain crisp, bright finishes—especially with lighter stones—choosing the right binder is crucial.
What Makes Polyurethane Non-Yellowing?
Standard polyurethane resins can discolour when exposed to sunlight, turning yellow with age. Non-yellowing polyurethane, however, is specially formulated to resist UV-induced colour changes. This makes it particularly suitable for outdoor applications where long-term exposure to sunlight is expected.
Because of its UV stability, non-yellowing polyurethane is recommended for those using white or very light-coloured aggregates in resin bound gravel or permeable floor systems.
Practical Tips for Choosing a Resin Binder
When installing permeable resin-bound floors, the right resin can mean the difference between a surface that stays true to its original colour and one that quickly looks tired. For white stones, opt for a non-yellowing polyurethane to ensure your floor remains vibrant. For coloured or dark pebbles, a UV-resistant epoxy such as “Trasparente” – Epoxy Binder for Coloured Pebbles and Grits offers reliable performance and a clear finish.
- Always check the manufacturer’s advice for the recommended binder type.
- Prepare the surface according to instructions for best durability and drainage.
- Apply in suitable weather conditions—ideally between 10°C and 40°C.
When Non-Yellowing Polyurethane Matters Most
If your project uses white marble or other pale stones, non-yellowing polyurethane is essential for keeping your chosen look. It’s also the product of choice for highly visible or decorative outdoor surfaces, such as driveways or patios, where fading or yellowing would be especially noticeable.
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By selecting the right binder—like non-yellowing polyurethane—you protect the beauty and longevity of your resin bound gravel surface. For more advice on permeability and suitable resin systems for your next project, visit our main page on resin bound gravel permeability in the UK.