A-JOINT® POLYSAND PRO is a water-permeable special joint sand with weed-inhibiting effect for very narrow joints. It is characterized by its simple and quick application and is ideally suited for the professional and the hobby craftsman.
Due to its fine grading curve, A-JOINT® POLYSAND PRO is particularly suitable for closely laid interlocking pavers on private terraces and public roads and paths. The joint sand remains permanently flexible and is therefore ideally suited for unbound construction on new and renovated surfaces.
A-JOINT® POLYSAND PRO is low in dust, does not leave any binder film on the stone surface and is therefore also suitable for the grouting of coated and sensitive coverings.
- Stable and flexible joint filling
- Prevents sanding out of the joints
- Ready-mixed and virtually dust-free
- For very narrow joint widths from 1-5 mm
- For joint depths from 30 mm or 2/3 of the
- Can be used from 5°C soil temperature
- Rainproof and walkable after 3 hours
- For coated and sensitive coverings
Preparing the site
The joints must be cleaned of weeds, roots and loose parts to a depth of at least 30 mm (2/3 of the stone height for traffic load) without leaving any residue. The surface to be grouted must be freed from all dirt. As moisture activates the binder prematurely, the stone surface must be completely dry before and during application. Residual moisture can be dried e.g. with a gas burner or compressed air. To avoid settling and loose stones, we recommend a permanently waterpermeable and load-bearing substrate corresponding to the subsequent load (pay attention to the current standards and guidelines).
Filling the joints
Open the bucket and spread the contents over the dry surface. Now sweep the joint sand carefully and intensively into the joints with a broom. The joints must be completely filled. Clean the stone surface carefully with a fine broom until there is no more residue on the stone surface. Make sure that chamfers (bevelling of the side edges) on slabs and pavers must be exposed.
If your covering is suitable for the use of a small vibrating plate (with protective mat if necessary), we recommend additionally vibrating the surface. Then refill the sagged joints again. Repeat the process if necessary.
Now spray the entire surface with a fine water jet (meterable nozzle). Avoid foaming of the binder by applying too much water pressure. Repeat this process several times several times until the joints are completely saturated and can absorb no more water. Prevent the joint material from being washed out and puddles and rivulets from forming.
At temperatures around 20°C, the surface can be walked on after 3 hours and driven on after 3 days. Complete curing requires complete drying of the joint. Settlement cracks and defects can be repaired without great effort.
Technical application notes:
Use A-JOINT® POLYSAND PRO only with a permanently water-permeable substructure or a slope of at least 2%. Do not use in permanent wet areas or in case of waterlogging. Application in outdoor areas is recommended. Cleaning with a high-pressure cleaner (max. 80 bar) should only be carried out at a distance of at least 40 cm. There may be signs of wear or defects in the grouting. These can be repaired with little effort even after years.
Regularly remove dirt, leaves and moss from the joint surface.
All fillers are natural products and are subject to natural colour variations. Our information is based on years of experience and the current state of the art, but is non-binding and does not constitute a contractual legal relationship.