Stone dust for narrow and broad joints

Our dark granite stone dust is a strong choice for both wide and narrow joints between concrete tiles and natural paving stones. The dust gives a fine result to match paving stones with particular characteristics such as cobblestones – and leaves very little dust.

The NO GROW mixture consists of crushed, washed and dried granite with an added mineral additive. The additive has a naturally high pH value, which creates a nutrient-poor growth environment in the joints. Weed seeds dry out and can not take root and germinate. The minerals dissolve slowly and are not washed out until after 10 years of rain. With the correct use of DANSAND® stone dust, you get a great result that lasts for many years.

Declaration

Dansand^® stone dust consists of washed, oven-dried granite stone dust. A high pH mineral additive has been added. Available in anthracite. The joint material is ready-mixed and can be used directly from the bag. 

Packaging

Frost-proof foil. Plastic bags made of PP material. 

Storage

The bags can be stored outdoors during the summer. However, we recommend a covered storage location, as the plastic foil cannot tolerate heavy rain. 

Safety

Safety data sheets can be obtained at the following link.

Application

For new and existing paving. Only for outdoor use on dry foundation. Only suitable for unbound substrate. Suitable for private use.

Estimated amount: At 14x 21×5 cm paving stones with a joint width of 2–3 mm = 2.0 kg/m² . Our coverage calculator can help you find the correct amount you need.

Joint depth must be 40 mm minimum. Joint width must be from 3 to 10 mm.

How to do it

The paving stones are laid on a sustainable gravel and sand layer in accordance with current standards for paving work. The joint material is water-permeable like ordinary jointing sand, which is why the base layer must also be water-permeable.

Refilling

DANSAND^® Stone dust is not a remedy for weeds. To prevent existing weeds from growing, weeds and roots must be completely removed before filling the joint. Clean the joint of old joint material to a depth corresponding to the entire height of the stone. This is done with a joint cleaner. Next, you can use a high-pressure cleaner, but be careful not to damage the paving stones or the substrate. Refill the joint as described during grouting of new paving.

Maintenance

To avoid weeds in the joints and displacements in the coating, the joint must always be filled to the full height and be completely free of soil and other organic material. The paving can be cleaned with a stiff broom as needed and the joints refilled. Moss and algae can be removed by suitable means. Extreme weather conditions can cause efflorescence in the joints and on the edges of the paving stones. However, this is usually washed off at the next rain shower. You can also remove these salt deposits by regular cleaning of the paving stones.

Please note:

• Do not use the joint material in the joint directly adjacent to a plinth or other masonry. Use neutral filling sand instead, as otherwise there is a risk of efflorescence.
• Not suitable for bricks, tiles and porous natural stones
• Efflorescence can occur when the material is used under covered areas (carports, etc.). This can be removed with water or using a broom. Efflorescence under covered areas will eventually disappear as the excess of salts in the minerals diminishes.
• Use only on dry paving and in dry weather conditions.