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The right resin-to-pebble ratio is essential for a strong, durable, and attractive resin-bound surface. Whether you’re working on a driveway, pool surround, or garden path, correct mixing ensures lasting results and ease of application. Let’s break down exactly how much resin is needed per bag of pebbles for your next project.
Typical Resin-to-Pebble Ratios
For binders such as Polirock or Trasparente, you’ll usually require around 3% resin by the weight of your chosen aggregate. That translates to roughly 1kg of resin for every 30–35kg bag of pebbles. The precise amount may vary depending on the size of your stones and the surface finish you desire—smaller aggregates may need a little extra resin, while coarser stones can require slightly less.
Mixing and Application Tips
To achieve an even coating, thoroughly mix the resin with the pebbles until each stone is well-bound. For DIY installations, a cement mixer is highly recommended, especially for larger areas. Make sure your pebbles are dry and free from dust. When using specialist products like Polirock polyurethane binder for white stones, or the Trasparente epoxy binder for coloured aggregates, always check their specific guidelines provided with the product.
When This Ratio Matters Most
Getting your resin-to-pebble balance right is crucial when you want your surface to be permeable—allowing water to drain away without pooling—and visually consistent. It’s especially important for outdoor areas around pools, garden paths, and places exposed to variable weather. Using too little resin can result in loose stones, while too much may make the finish less porous.
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Understanding the correct resin amount per bag of pebbles ensures your resin paving performs and looks its best. For more advice on kits, material choices, and costs, explore our main guide on pool surround resin paving prices.