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Gravel-Lok for Driveways and Walkways


Gravel Lok installed on a drivewayGravel Lok Resin Bonded Surfaces

Gravel-Lok™ single element, moisture curing liquid that was designed to bond a variety of aggregates. When its used with Cell-Tek's LSG Series™ Load Support Grid, it will create an absorbent, durable natural stone surface that can be used in many different civil, residential and industrial applications. It is also ideal for municipalities, parks, other porous surface projects, and stonescaping in residential areas.

Combining natural pebbles with a polyurethane binder and then apply with a trowel to create the surface you are looking for that is decorative and attractive.


This gravel locking product is available in two different formulas, clear and amber. Each is available in a one-gallon trial size, 5-gallon container, or a 50-gallon drum.

 

The Clear Formula:

Comes colorless or light yellow in color that is ideal for white or other stone colors. It's a great choice for residential walkways, patios, garden paths, stonescaping, french drains, along flower beds in gardens, tree pits, and surroundings.


The Amber Formula:

If you want your white stones to remain white, do not use this formula, they will change color. It great for residential garden pathways, stonescaping around your flower beds in the garden, french drains, and tree surroundings.

 

The Benefits:

• Very easy to install

• Very strong

• Comes with artistic design options

• Multiple styles, colors, and textures

• ADA compliant when used with 1/8-inch to 1/2-inch size stones

• Made in the USA



Benefits For The Environment:

• Captures airborne pollutants

• Reduces stormwater runoff

• Reduces hot temperatures on the surface

• Naturally recharges groundwater



image of person installating the gravel locking materialDecorative Surface Options:

• Pea and River Gravel

• Granite

• Marble

• Recycled Glass & Many More!


The following is general information pertaining to resin boding. (Gravl-Lok is a resin bonding product) For instructions on this product specifically refer to the official installation instructions, not the below information which is general in nature.

 

How Resin Bonding Is Done:

Scatter loose dried aggregate on a coating of resin directly after the resin is applied to the surface. This process is commonly referred to as broadcast coating, scatter coating or coating systems.


Another method is applying the resin over an appropriate base using a squeegee then scatter the aggregate over it before the resin sets.

 

What Kind Of Base Should Be Used?

Resin-bonded systems can be used on existing or new bases. Usually, the surfaces are tarmac, concrete, asphalt, or other singular stone material as long as it has been cleaned including the removal of loose materials and dust and then properly prepared. If needed use a sealant if necessary to ensure the resin will adhere to the base. Any remaining contaminants such as oil, film algae or fungus will have to be removed with a good degreaser.

Ensure the base is in good condition because the finish and life-expectancy depend on the durability of the base.

Make sure your base is level, any damaged sections or cracks are properly repaired before applying the resin. Always ensure the base is suitable for the traffic load that will be expected to carry once the resin system is applied. The suitability of a base can vary depending on the system being used. It is recommended that you get advice from the resin supplier beforehand.

Surfaces with fewer joints that are usually larger provide the best finishes. This includes tarmac or concrete. Bases that are made of paving products such as block paving are Not Recommended For Use. This is due to the cracks and lines below the surface that will ultimately cause cracks in the resin and eventually will fail due to extreme pressure placed on the resin day after day.

When laying a new base for the resin, make sure it has been allowed to cure properly before applying the resin. Bitumen is a black mixture of natural hydrocarbons or residue from petroleum distillation that is commonly used on roads. These surfaces should be allowed to cure for 28 days in order to allow it to oxidize and weather.

Concrete will need at least 7 days to cure correctly. It is also important to understand that any base used, the moisture levels on the surface must meet the acceptable level recommended by the resin manufacturer. All the advice of the manufacturer and their recommendations should be followed. This includes preparation, proper cleaning, etching, or any other process that is being used.

For all surfaces that are absorbent, a primer should be applied which includes concrete surfaces. This usually consists of a 2-pack fast curing epoxy primer along with a scattering of C52 sand, which will set in approximately 90 minutes. Be sure to mask off any areas or corners that are nearby but be sure to remove them before the resin fully sets.


Flattening out a gravel areaOther Types Of Bases:

Some manufacturers claim that wood decking, paving flags, and block paving can be used. The general opinion within the trade strongly suggests not to use the basis. Even though outdoor decking could be coated, wood is very unstable and will lead to cracking taking place in the resin. If the wood base is going to be used, only choose an exterior grade of wooden deck surface.


Can The Application Process Take Place In Any Weather?

Changes in temperature and humidity can have an effect on the application process and the time it would take to cure. If there is a prediction of rain or it's very damp, then the application should not be done. If there is a chance of rain within 24-hours of the application it is advisable to cover up the resin to protect it and prevent water from reacting with the uncured resin. Again, it's always advisable to follow the guidelines set by the manufacturer and what suitable conditions should be.

 

Who Is Qualified To Apply The Resin?

Although a skilled novice might be able to apply the resin. It is recommended that you hire an experienced specialists. We will be more than happy to provide you with contractors in your area.

 

Different Kinds Of Resin And How To Mix It:

There are two leading kinds of resin for bonding, Aromatic Resin and Aliphatic Resin and both have different properties and use.


Aromatic Resin:

This is a Non UV Stable polyurethane resin used in both resin bound and bonded applications. It will be affected by sunlight by changing the color to a darker shade and is typically used for darker aggregates or for non-decorative applications. It is also less expensive than the Aliphatic UV Stable Resin.


Aliphatic Resin:

This is a Clear UV Stable polyurethane resin that is great for all applications and is not affected by sunlight. Which means it will not change color allowing aggregates to retain their best appearance. This resin will not fade but it is more expensive.


How To Mix Resins:

Both the resin and hardener should be mixed using a drill paddle mixer for approximately 23 minutes to ensure everything is properly blended. An accelerator should also be added at this time if colder temperatures below 15 degrees apply or if there will be a light rain or dew overnight. An accelerator is needed to fast cure the resin if temperatures will be dropping below the recommended level by the supplier. In warm temperatures, the setting time can be between 2 to 4 hours but in the fall and winter months, the resin can still be somewhat tacky the next morning which is why an accelerator is recommended. The accelerator will prevent resin from being affected overnight when temperatures drop and moisture increases.


Compacting a gravel walkwayHow Resin Is Laid:

After thoroughly mixing, mask off edges that need to be protected and before pouring the resin. The resin is then poured in a series of lines and then spread evenly over the prepared surface using a serrated squeegee.

Leave it alone for approximately 10 minutes to allow the resin to level out or self-level. Then broadcast the aggregate or mop the surfaces. Broadcasting should ensure that the resin is completely covered. Make sure you do not walk on the aggregate or resin while performing broadcasting. Once the process has been performed, masking tape should be removed. As the aggregate settles on the surface, keep an eye out for any heavy areas of excess resin and ensure that sufficient aggregate has been applied to keep consistency in appearance. If another area needs to be covered, leave a wet edge and start the process again while the other area is set, continue this process until it's completed.


How Much Aggregate Should Be Used?

With a resin bonded application, typically it would take between 8 to 10kg per square meter.


The Available Colors:

There are over 50 different aggregates available and therefore just about any color scheme can be catered for. Carefully blending with different colors can create a different look and color. Also, there are a number of aggregates can be colored to let customers select finishes of just about any color they want.

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Aggregate bonded systems will provide a long lasting, nice finish that requires practically no maintenance if applied properly. How the bond between the resin and base is applied is critical for success.

It is highly recommended you hire an experienced, reputable contractor to prevent most issues associated with the finish. If the surface has not been seal properly and the base it was applied to was not a suitable material or frost and moisture were present, the top surface could separate from the base.

Any insufficient work performed on this kind of surface, such as concrete or tarmac, will show signs that would require patch cutting of the surface then be resurfaced. The aging of the original product and the variations in color of the stone would be almost impossible to blend in.

 

About Rust Staining:


There are some aggregates used in resin bonded systems that have a certain level of iron minerals which is a part of their natural makeup. When exposed to weather, it could result in some areas developing rust spots. This is a natural occurrence in the aggregate but at no time before or during the application can the iron be seen. This can be taken care of after rust staining has been found.


Keep in mind, installers and/or suppliers cannot be held responsible for damage suffered as a result of staining. Higher risk resin bonded products are 10mm Yellow and Yellow 2-5mm.


Note:

It is critical that the aggregates are dust-free, clean, and consistent or they will not bond!

 

Cleaning The Surface:

One upside to resin-based surfaces, they are very low maintenance. Always follow the instructions provided by the resin manufacturer before cleaning. In most cases, a gentle power wash is all that will be needed to clean the surface.

 

PLEASE NOTE:

The preceding is general information only. Any technical information, application instructions, which include H&S information, safety data sheets, method statements, and COSHH information, should be supplied by the supplier of the system. Paramount Materials accepts absolutely no responsibility for any applications taken using the information provided on this site.

For more information on resin bonding installations please see the official blog