Curtain Injection Waterproofing System


Exterior basement waterproofing from inside the building: in the case of renovation, it is not always possible to expose the exterior walls through excavation. For example, where the area to be excavated is built upon, traffic concerns impede the excavation, or the economic cost of excavation is deemed prohibitive. In this case you would first think of an internal (negative side) basement waterproofing, but in some cases, such as in historical buildings or buildings with special architectural requirements, this may not be desirable.

In these cases a curtain injection with KÖSTER KB-Pur Gel is possible; where the resin is injected through the wall from the inside to the outside. The resin reacts with water and binds it resulting in a waterproof, elastic mass. The injection is carried out with a special pump and through patented KÖSTER Distributor Lances. The injection material is dispersed on the exterior wall and in a short time reacts to a waterproofing layer. An alternative method is injecting KÖSTER KB-Pur Gel into the building member itself. This so-called “area injection” is possible in porous or hollow building materials. In this case the KÖSTER KB-Pur Gel also reacts with any water present to form a waterproof, elastic mass.

System Components:

  • Pump: KÖSTER Gel Pump.
  • Lance: KÖSTER Injection Lance or KÖSTER Distribution Lance.
  • Waterproofing layer: KÖSTER KB-Pur® Gel.

General information

Uniclass 2015

Pr_20_31_02_50 Masonry injection resinsPrimary


J30/110 Cold applied tanking . . . . . .

Product range

External Basement Waterproofing Systems

Specification data - Masonry injection resins

Product Reference

Curtain Injection Waterproofing System

Standard product features

Waterproofing layer:

- KÖSTER KB-Pur® Gel:

Solvent-free, water activated polyurethane gel. Depending on the amount of water added, a highly elastic waterproof massive or respectively foam hydro gel is formed. It does not promote corrosion and is designed and tested for use in drinking water environments. It can be used for curtain and area injection as well as for posterior waterproofing of dilatation joints.


Koster Waterproofing Systems: The Green Pages of Waterproofing and Construction Chemicals

Koster Waterproofing Systems: The Green Pages of Waterproofing and Construction Chemicals

Koster Waterproofing Systems: External Basement Waterproofing

Koster Waterproofing Systems: External Basement Waterproofing