A-JOINT® READY FLEX is a ready-to-use and vacuum-packed paving joint mortar with a fine sand grain and excellent slurry properties, perfect for narrow joints from 3 mm.

A-JOINT® READY FLEX prevents weed growth in the joints, is waterpermeable, frost-proof and hardens through contact with atmospheric oxygen. Its lasting flexibility makes it ideal for grouting large-format slabs on terraces and walkways.

A-JOINT®READY FLEX can be used for almost all ceramic coverings as well as for coated and sensitive stone surfaces.

stone grey


  • Flexibilized for large-format slabs and unbound construction methods
  • Sustainable, slip-resistant joint solution
    (Use category N1).
  • For joint widths between 3-5 mm
  • For joint depths from 20 mm
  • workable from 5°C soil temperature
  • Ready mixed and vacuum packed, immediately "READY" for processing
  • Can be applied with water, almost free of resin film
  • Can be used in light rain, humid weather
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Processing instructions:

Preparing the site

The joints must be cleaned of weeds, roots and loose parts to a depth of at least 20 mm without leaving any residue. The covering to be grouted must be freed from any dirt. Adjacent areas not to be grouted should be masked or covered. To avoid settling and loose stones, we recommend a permanently water-permeable and load-bearing substrate corresponding to the subsequent load.


Pre-wet the entire surface extensively. Higher soil temperatures and absorbent, open-pored stone require more intensive pre-wetting. Generally, use clean and cold water.

Filling the joints

Remove the vacuum bag from the bucket, cut it open and spread the compound evenly over the well pre-wetted surface. Work the paving joint mortar intensively into the joints with a rubber squeegee and a soft water spray. When filling, make sure that the stone surface does not dry out. The joints must be completely filled and compacted. Sunken joints must be refilled with fresh paving joint mortar immediately.


Cleaning the surface

Directly after filling the joints, carefully clean the stone surface with a medium-coarse street broom diagonally across the joint. Remove all residues of the paving mortar from the stone surface. Do not reuse any material that has been swept off. Be aware that chamfers (bevelling of the side edges) on slabs and pavers must be exposed.


Protect the freshly jointed surface from continuous or heavy rain for 12-24 hours. We recommend construction foil or tarpaulins as rain protection. These can be laid directly on the surface. At temperatures around 20°C, the surface can be walked on after 24 hours and is fully loadable after 6 days. Low temperatures and high humidity can extend the complete curing time up to several weeks. Due to raw material light sanding of the mortar surface is possible. A strength test is always recommended before use. Cleaning work (high-pressure cleaner max. 100 bar, min. 30 cm distance) may be carried out after 7 days at the earliest.


Resin film: After grouting with A-JOINT® READY FLEX, a thin resin film remains on the stone surface in case of insufficient watering, which intensifies the stone color and protects the stone against soiling. This resin film usually disappears over time due to weathering and use of the surface. If in doubt, create a small test area. The resin film is not a design defect, as neither the quality nor the functionality of the joint is affected.

Technical application notes: Use A-JOINT® READY FLEX only with a stable, load-bearing and permanently water-permeable substructure or a slope of at least 2%. Take into account the current regulations for the construction of terraces and paths. Do not use in permanently wet areas or in cases of waterlogging. A-JOINT® READY FLEX has an inherent odor which disappears over time after complete curing. Application is recommended only in well-ventilated outdoor areas. We would like to point out the wearing of adequate protective work clothing. Work shoes and tools must be free of dirt and should be cleaned with water during and after application.

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.