Injection of Grouting Hoses

Injection of Grouting Hoses

The injection hoses laid in the construction joint according to plan are grouted after the shrinkage of the concrete has been completed and initial settling has occurred. As the concrete shrinks, a joint is formed around the injection hose, which enables the injection material to be distributed evenly. This also fills any voids and hollow areas in the concrete structure that may be caused by compaction errors.

Depending on the choice of the injection material, the hose can be injected several times, so that another injection can be carried out if moisture penetration occurs later.

TPH offers you high-quality sealing materials for the injection of injection hoses that are watertight under pressure. All materials presented in the following have proven themselves over many years and have a proof of suitability in the form of a general test certificate issued by the building authorities.

  • Active sealing system
  • Enables filling of cracks and cavities within the component
  • Sealing and renovation in one
  • Injection lengths up to 30 m depending on the type of hose
Injection of grouting hoses with acrylate gel

Injection of grouting hoses with polyurethane resin

Recommended Systems


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

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