Resin Bound vs Resin Bonded: What's the Difference?

Resin bound and resin bonded are two methods for creating aggregate surfaces for driveways, forecourts, patios, and pathways. Both combine loose stone with resin, but they produce very different results in finish, durability and permeability. 

In this article, we'll break down the differences between the two surfaces, including application, durability and cost. 

The short answer

The main difference between resin bound and resin bonded surfaces is how the stone and resin are combined and laid:

• Resin bound: Stone and resin are mixed in controlled ratios, then spread across a prepared base, creating a smooth, seamless and permeable surface. When the whole system is installed correctly, it is SuDS (Sustainable Drainage Systems) compliant and doesn't require planning permission. 

• Resin bonded: A thin layer of resin is spread onto the base and aggregate is scattered over the top, giving a textured, grippy finish with the look of loose gravel. The surface is impermeable, so water runs off rather than draining through. 

Both need a sound base, but they look, feel and drain differently. Let's take a closer look at each system, starting with resin bonded. 

What is resin bonded? 

With a resin bonded system, resin is laid in a thin layer onto a prepared base. A mix of dry aggregate - the decorative stone - is scattered on top while the resin is still tacky. The stones adhere to the resin at their base but sit proud, creating a textured appearance, similar to loose gravel but with far less migration. Because the resin is laid in a continuous layer, this type of surface is impermeable.   

How is a resin bonded surface applied?

• Base preparation: Resin bonded surfaces can be applied to a solid base such as concrete, provided it's in good condition. Because resin bonded surfaces are impermeable, the base needs a slight slope so water drains away towards a channel drain or gully. 

• Resin application: Resin is applied in a thin, even layer across the whole base using specialist tools. 

• Aggregate broadcast: Decorative aggregate is scattered over the resin while it's still tacky. Most stones adhere to the resin, and any loose ones are brushed off after curing. 

• Curing and finish: Once the resin has cured, the stones sit proud of the surface so you get a surface with a lot of texture and grip.  

What is resin bound? 

In a resin bound system, the aggregate and resin are mixed first, so every stone is fully coated before it reaches the surface. The mixture is then trowelled onto a prepared base in a single layer, where the stones lock together into a smooth, seamless finish. Unlike resin bonded, where stones are scattered onto a layer of resin, resin bound is a fully blended surface, and the gaps between the stones make it permeable. 

How is a resin bound surface applied?

• Base preparation: Much like resin bonded, resin bound can be applied over concrete if it’s in good condition. However, to achieve a fully permeable surface, it's recommended to excavate and rebuild the base with permeable materials such as VubaMac, unless a permeable base exists already. This allows water to drain through the whole system and back into the ground, helping the surface meet SuDS requirements. Dig depths vary depending on the intended use of the surface. 

• Mixing the resin and aggregate: The aggregate is mixed with a two-part polyurethane resin binder in a forced-action mixer. This ensures that each stone is evenly coated in resin. 

• Laying the surface: The mixed material is tipped onto the prepared base, spread into an even layer using a spazzle, and then hand-trowelled to a depth appropriate for the surface’s use.  

• Curing and finish: Once laid, the resin cures in 24-48 hours and is ready for light foot traffic after that. It can take vehicles after 72 hours, although a week is ideal. The result is a smooth, even finish with every stone fully bound in resin. When laid over a suitable base, it is also fully permeable. 

Key differences, and what they mean for your driveway

Appearance and texture

In resin bonded systems, the stones sit proud of the resin. This provides a lot of grip, particularly when wet, so it can be a practical choice for slopes and steps. 

With resin bound, you get a smooth, seamless and contemporary look with a uniform finish from edge to edge. It looks modern and sleek and comes in a range of finishes and colours. Even though it’s got a much smoother finish than bonded systems, it’s still slip resistant, even when wet. If you choose a Vuba system, you also get certified slip resistance for wet and dry conditions, thanks to the added binding quartz and anti-slip scatter.

Drainage

Because the resin is laid in a continuous layer, resin bonded surfaces are impermeable. They rely on run-off, so they're usually laid to a slope with channel drains, and you'll need planning permission for any surface larger than five square metres. 

Resin bound surfaces are fully permeable when laid on a porous base and meet SuDS (Sustainable Drainage Systems) standards. In general, that means you won't need planning permission, and you can be confident your new surface won't pose a flood risk.  

Loose stones

Resin bonded surfaces are much more prone to loose stones than resin bound, because the aggregate is only partially submerged in the resin. In resin bound systems, the aggregate is evenly coated in resin before it is laid, so every stone is locked firmly into place. That makes it the better option if you want a driveway that looks as good in year five as it did on day one.

With both types of surface, loose stones can be more common with repeated dry steering (turning the wheel while the vehicle is stationary), loads beyond the surface's specification, and heavy traffic over the same section. But resin bound generally holds up much better against loose stones. 

Maintenance and upkeep

If you want a low-maintenance surface, resin bound is the better choice. Because every stone is fully encapsulated in resin, the finish is smooth and gives weeds, moss and other organic matter very little to take hold of. An occasional sweep and wash is usually all the surface will need. 

Resin bonded is a different story. Its textured finish traps seeds and debris between the stones, so it needs regular sweeping and more thorough hosing, and you'll also need to deal with stones that work loose over time too. 

Durability  

Overall, resin bound is far more durable than resin bonded, outperforming it on most of the measures that matter for a driveway. Here's how the two compare side by side: 

Resin bound is the more durable option, but how well either surface lasts depends heavily on the quality of the installation. A poorly prepared base, the wrong resin-to-aggregate ratio or rushed groundwork can undermine even the best system. 

Cost 

Resin bound costs more upfront than resin bonded, but it lasts much longer, so it often works out better value over time. The higher price reflects what goes into it: more materials, because it's laid as a thicker layer, and skilled labour, because the mix is spread and trowelled by hand. A full dig-out and permeable sub-base adds further cost, but it's what gives the surface its drainage and long-term stability. For a more detailed breakdown of resin bound driveway costs, including example projects and the factors that affect installation prices, read our resin driveway cost guide. 

Resin bound vs resin bonded at a glance

The Vuba system 

On most of the measures that matter for a driveway, resin bound surfaces outperform resin bonded surfaces. And with a Vuba system, you get all the benefits of resin bound, with the added benefit of sourcing the entire system from one place.

It starts with Vuba Foundations, our own sub-base material, sourced exclusively from Vuba approved quarries. On top of that sits VubaMac, our permeable sub-base, which the Flood Innovation Centre found to have permeability rates up to 19 times higher than traditional block paving. Our Structural Reinforcement Mesh then reinforces the system, increasing structural strength by 73% in independent testing, and UV-stable resin finishes the surface, which has undergone weather testing to prove it holds up under prolonged UV exposure.

To find out more about getting your very own resin bound surface, check out our homeowners hub, or explore our gallery of completed projects. 

Want to work with us? Find out more about joining the Vuba installer network.