Single component injection resin based PU foam for the stopping of flowing water in cracks and cavities


Polyinject Stop is a single-component injection resin on polyurethane base, which is used for stopping water ingress, for stopping flowing water in combination with acrylate gel grouting, for ground and rock hardening, as well as for numerous other sealing requirements in civil and mining engineering and in tunnel construction. Polyinject Stop reacts with the water present in the injection area with foam formation. with the addition of up to 10% Polyinject Stop catalyst to the Polyinject Stop polyurethane resin, the potlife can be reduced.


  • Single component
  • Potlife adjustable with catalyst
  • Can be injected with 1-C pumps
  • Flexible foam formation

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by Step

Surface preparation

If the water flow allows the surface should be stable and free of separating substances. Insufficiently firm layers and concrete slurry must be removed. Especially when applying surface packers and in case that the crack will be sealed, the substrate must be sufficiently prepared.

Work Preparation

Polyinject Stop has to be applied with injection packers. the injection packers may be fixed into holes drilled directly into the crack or drilled diagonally from concrete adjacent to the crack or by the fixing of injection nipples bonded to the surface using Polypur F. For further assistance and instructions regarding the packer fixing and design please refer to our method Statement.


Polyinject Stop is a single-component resin, which is injected into the water-carrying areas with pneumatic, electrical or hand-operated 1-c pumps. Take care to exclude moisture as much as possible and place the mixed material in an enclosed container after mixing. To decrease the potlife, up to 10% of catalyst can be added and mixed into Polyinject Stop. The mixture of Polyinject Stop and catalyst lasts approx. 8 hours. A skin can form on the liquid surface through reaction with water, which does not influence the processing of the material. Only mix sufficient resin that can be used within the pot life of the material. When flowing water has been stopped, reinject with Polyinject PU or any other suitable injection resin out of the polyinject range to produce a permanent seal. For further information refer to the concerned datasheet.