Ideal Resin to Stone Ratio for Permeable Floors & Pool Surrounds

Q: Recommended Mixing Ratios

For most permeable systems, aim for approximately 3% resin by weight of your chosen stones or pebbles. For example, each 25kg of aggregate will require about 750g of resin. It's important to weigh your stones accurately and always refer to any technical instructions provided with your selected resin—for instance, the Flowstone Complete Permeable Floor Kit includes comprehensive resin dosing guidance. For white stones, a polyurethane binder is typically advised for a clear, non-yellowing finish. For coloured or darker aggregates, opt for a UV-stable epoxy binder for best performance.

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What Resin to Stone Ratio Is Needed for Permeable Floors?

Getting the resin to stone ratio right is key for building long-lasting, permeable pool surrounds and outdoor floors. This quick guide explains how to measure and mix for reliable results.

Why the Resin to Stone Ratio Matters

The ratio determines both the durability and permeability of resin-bound floors. Too little resin may cause weak bonding and loose pebbles, while too much can fill gaps, limiting water drainage. For outdoor areas that need effective water run-off—such as pool surrounds and garden paths—a precise ratio ensures structural strength without compromising drainage.

Recommended Mixing Ratios

For most permeable systems, aim for approximately 3% resin by weight of your chosen stones or pebbles. For example, each 25kg of aggregate will require about 750g of resin. It’s important to weigh your stones accurately and always refer to any technical instructions provided with your selected resin—for instance, the Flowstone Complete Permeable Floor Kit includes comprehensive resin dosing guidance.

For white stones, a polyurethane binder is typically advised for a clear, non-yellowing finish.
For coloured or darker aggregates, opt for a UV-stable epoxy binder for best performance.

Practical Tips for DIY Application

Thoroughly dry and clean your aggregate before mixing to help the resin distribute evenly. Mix the resin and stones in a large container or cement mixer until all pebbles are coated. Apply to a dry, prepared base in suitable weather for the best adhesion. Always check the specific product’s instructions, especially regarding working times and curing.

When This Matters Most

Correct resin to stone ratios are particularly crucial in pool areas, pathways, and driveways where water must soak away efficiently while maintaining a solid, attractive surface.

Related guides

Which Product Should I Choose For Permeable Pools

Choosing the right resin to stone ratio is a practical step towards an effective, long-lasting permeable floor. For in-depth product choices tailored to pool surrounds and outdoor spaces, see our main advice on which product to choose for permeable pools.