Injection in grouting hoses

Injection in grouting hoses

The systematically installed injection hoses into the construction joints get grouted after the atrophy of the concrete is finished. First setting of the concrete is presumed. During the shrinkage process of the concrete a joint is build up around the hose, which secures a successful grouting of the same. Like this, problems appearing while compacting of the fresh concrete resulting in gaps and cavities can be combed out.


Depending on the chosen injection material the hose can be grouted multiple, which gives the advantage of the post-application in case of later observed leakages

Injection of grouting hoses with acrylate gel

TPH offers secure and long term solutions for grouting of injection hoses.All products, systems and solutions, which will be presented in the following chapters, are approved for many years on the sites in and are in possession of a General Appraisal Certificate.


  • Active sealing system
  • Enables filling of cracks and hollows within the structure
  • Sealing and restoration in one step
  • Dependant on type of hose up to 30 meter length is possible

Injection of grouting hoses with polyurethane resin


For the grouting of the injection hoses VPRESS® and MEDIPRESS the acrylate gel RUBBERTITE/POLINIT has been approved by the building authorities to resist a water pressure of 5 bar. The benefit of the injection with RUBBERTITE/POLINIT as opposed to the compression with Polyurethane resins is that the acrylate gel can be injected several times.

On the one hand this depends on the consistency of the inner duct of the injection hoses VPRESS® and MEDIPRESS and on the other hand it depends on the fact that RUBBERTITE /POLINIT contains water as a solvent and consequently can be simply flushed from the hose without exerting pressure within the reaction time of the products. In this case the application of the injection pumps BOOSTER 10 A and MINIBOOSTER 5 U is recommended, which are equipped with an external scavenging pump.

A further benefit of the acrylate gel RUBBERTITE/POLINIT in the compression of injection hoses is the extremely low blending viscosity.

Whereas when Polyurethane resins are employed as the injection material the individual hose sections may not exceed a length of 10 m, when RUBBERTITE/POLINIT is employed also section lengths of up to 30 m, which could be necessary according to the particular construction, can be reliably compressed.
By reason of the extremely low viscosity the filling of the injection hose can be achieved in a few seconds on the one hand and, on the other hand, the even distribution of the acrylate gel in the construction joint can be accomplished without any difficulty even in the case of hose section lengths of 30 m. This has been proven in the course of an appropriate application technological test.

Injection hoses for sealing of biogas plants

Flexible sealing system, approved for use in CHF and LMSS plants