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Getting the resin to aggregate ratio right is key for strong, attractive pebble surfaces. An accurate mix ensures your flooring is durable, well-bonded, and keeps its finish over time.
Understanding Typical Ratios
The ideal ratio depends largely on the size of your chosen aggregate. For smaller pebbles (1–2 mm), you might require around 800g of resin per 20–25kg of aggregate. For larger stones (10–20 mm), approximately 400g of resin per 20–25kg is common. Always check your product’s recommendations, as these figures can vary depending on the type and absorbency of the aggregates you use.


Essential Measuring Tools
Precision is crucial—especially when working with epoxy products. Use a graduated measuring cup with clear markings to make sure each component is dosed accurately. Measure the resin and hardener separately, then mix thoroughly before adding your chosen gravel or pebbles to guarantee even distribution.
Mixing Tips for Best Results
Mix gravel and resin in small portions to maintain consistent coverage. It’s usually best to coat the aggregate fully; incomplete mixing can lead to weak bonds and uneven surfaces. For large outdoor installations, consider kits like the Flowstone Complete Permeable Floor Kit, which provides materials and ratio guidance for reliable results.

When Getting the Ratio Right Really Matters
- Outdoor surfaces exposed to heavy traffic or weather
- Decorative areas where clarity and finish are important
- Ensuring project longevity with minimal maintenance
Related products
Related guides
Following accurate resin-to-aggregate ratios gives your pebble floors the durability and finish they deserve. For more help on increasing resin volume for your project, explore our advice on what to use with resin to increase volume.
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