SoRoTo portable pan mixer in use
Forced Action Mixers

Forced action mixer: a guide to mixing resin

Five steps for installing resin bound gravel using a forced action mixer

Forced action mixers are most popular with resin bound installers as it allows the mixing to take place quickly and delivers a consistent mix.

Using a pan mixer for mixing resin  allows individuals to save time, reduces costs and can contribute to avoiding flooding and weeds.

This blog post explains.

5 steps for installing resin bound gravel

What is resin?

Resin binder is an artificial polyurethane product which is similar to plant resin. Often it consists of two components – a glue and a curing agent.

Preparation is vital prior to installing the surface. Once the base is laid, the resin components can be mixed and installation takes place.

Speed is of the essence as resin is only workable for 30 minutes. While the resin and the curing agent is being whisked together, it may be advised to mix the aggregate – such as pebbles, gravel or sand – in a forced action mixer.

X-Grid is used on the driveway of Himley Field Cottage in Dudley, West Midlands
Resin bound gravel can complement the surrounds of an area with a comprehensive range available.

The 5 steps to mixing resin

1. Prepare the base.

2. Use a mixing paddle and whisk to prepare the resin

3. Use a forced action mixer to mix together the aggregate. The 100L is recommended for resin bound gravel.

4. Mix the resin bound aggregate.

5. Install the resin bound aggregate on the surface.

SoRoTo forced action mixer in use with wheelbarrow
Resin bound gravel can be installed in five simple steps.

What is needed to install a resin surface?

Once the mixing process has started there is only limited time before it hardens and cures. Becuase of this, being as prepared as possible is vital and it is important you have everything you need before you start.

There are a number of tools required for the installation:

  • A Forced Action Mixer
  • A Paddle Whisk
  • A Mixing Bucket
  • Multiple Trowels
  • Gloves
  • Glasses
  • Knee Protection
  • Digital Moisture Meter
  • Measuring Tools

This can be adjusted depending on personal preference and needs of the project.

Step 10: Clean the outside of the mixer
It is vital tools are on hand during the installation process due to the resin's fast curing time.

Equipment for use

SoRoTo 120L: This forced action is perfectly sized for resin bound gravel installations. It is able to hold an industry standard four bag mix. It is light and narrow enough to fit through standard doorways. 

SA120NEG 655mm Whisk: The mixing whisk is ideally suited to mixing low viscosity materials. It is designed for a faster mixing speed and no spillages. Used alongside the heavy duty bucket for mixing together resin components.

OX Pro Tough 15L Bucket: This incredibly tough bucket is perfect for using alongside a mixing whisk to combine part-A and part-B resin components. It is made with a higher rubber content than traditional buckets for strength. 

OX Pro Pool Trowel: This trowel is frequently used in the resin-bound industry for spreading, levelling and finishing surfaces. It has a soft grip handle so is comfortable to use.

The Resin Bull 500LT+: The Resin Bull is the only trowel which is specifically manufactured with resin bound gravel installation in mind. It features dual handles for added control and comfort. It is easier to detect areas of unevenness in the surface and rectify them before curing. It is perfect for corners and tight spaces.

The Comfy Bull Kneeling Pad: This equipment has been designed to protect resin bound installers against the effects of long periods of kneeling. It consists of an EVA foam cushion and vinyl cushion. It is designed to disperse weight distribution to avoid pressure on the knees and reduce the risk of injury and fatigue.

Soroto 100L Forced Action Mixer
The SoRoTo 100L has the ideal mixing capacity for resin bound gravel (4 bags).
Bucket and Paddle Mixer
Components are mixed together using a paddle mixer and whisk and bucket.

Step 1: Creating the perfect base

The best conditions for installing a resin bound surface is in area without holes and uneven areas.

The surface is not intended to be higher than adjoining grass areas therefore it is recommended that excavation takes place and install concrete with a thickness of 18mm.

The ground must be even before installation
The ground must be flat before installation.

Step 2: Whisking the resin

The resin needs to be mixed next.

The two components must be mixed – with a paddle whisk and a bucket used for this process.

The SA120 whisk is negatively wrapped so it is attracted to the middle of the whisk and down to the bottom of the bucket. Because of this, spilling and spray going outside the bucket is reduced.

Using gloves, pour the two components together. Whip in the resin for around 30-60 seconds, until it reaches a homogenous, creamy consistency. The resin will change colour and become whiter as it is whisked.

It is essential that whisked resin is not exposed to water. If water gets in, small crystals will develop in the resin and it will be unusable.

The resin can be worked with for about 30 minutes and the drying time is about eight hours. The higher the temperature, the more reduced the drying time.

SA120NEG Mixing Whisk
The mixing whisk is designed to minimise spillages.

Step 3: Mixing the aggregate

The first round of aggregates can then be poured into the forced action mixer.

Run the aggregate through the forced action mixer for about 30 seconds. If several colours are used then ensure they are distributed evenly and the majority of the dust is removed. 

Release the aggregate from the machine
Mixing the aggregate can poured into the forced action mixer and run for 30 seconds.

Step 4: Combining resin and aggregate

The resin can then be added into the mixer, mixing it with the aggregate.

Allow it to run for about 30-40 seconds then carefully pour in the rest of the pebbles and sand.

It is important to distribute the sand evenly, as it will otherwise it will appear lumpy in the mixture.

Pour the contents of the forced action mixer into a plastic-lined wheelbarrow. Turn off the mixer and empty it completely using a trowel and a brush.

Wipe it clean between batches and after use.

SoRoTo dust controller in use
The SoRoTo forced action mixer is designed to create an event, lump-free mixture.

Step 5: Installing the resin bound aggregate

Monitor again that the base is as it should be.

Pour all of the mixture out into one pile. Work from the furthest edge inward. Wipe the trowel clean regularly to ensure it doesn’t get stuck. The trowel can be used to press it towards the base and it can be spread to the desired depth.

Make sure that too many passes with the trowel as that can ruin the surface.

When the mixture is spread, the closest edge needs to stay loose and “rough” meaning it doesn’t set completely before the next batch is ready.

The next batch of mixture can then be poured – preferably before the edge from the prior batch has time to dry.

A pan mixer can be used when creating a resin bound gravel driveway
Resin bound gravel is easy to install and can be customised to blend into surroundings.


A forced action mixer is the most important purchase that can be made as a resin bound professional.

It is ideal for creating a smooth and consistent mix of resin and aggregate.

For mixing resin a forced action mixer, stirring whisk and cement bucket will be used. For spreading and levelling, trowels, measuring tape, kneeling pads and protective equipment can be purchased.

The first task for successfully laying a resin bound surface, such as a gravel driveway, is creating the perfect base. This excavation project ensures that the surface is without holes and uneven areas.

Secondly, whisking of the risk to combine the two components (resin and curing agent) can take place. SoRoTo whisks are designed in order to reduce waste.

 Mixing the resin and the aggregate can then take place using the forced action mixer. Pour the rest of the aggregate into the mixer, while distributing the sand evenly to produce a lumpless mixture. The resin-bound aggregate can then be installed.

To find out more information about resin bound gravel installation equipment call our team on 01246 418144.

Alternatively, contact us on webchat or email us here.

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