Koster Injection System for Water Bearing Cracks

Koster Injection System for Water Bearing Cracks

Koster Aquatecnic Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Koster Polyurethane crack injection system for water bearing cracks.

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In cases of water actively leaking from a crack KÖSTER 2 IN 1 can be used. This resin will foam on contact with water but will also cure to a solid body elastic resin where no water contact is made, thus enabling a 2-stage injection process with only one resin. In cases of very rapid water ingress KÖSTER IN 7 is used. This is a very fast foaming PU injection resin which creates a permanently elastic seal. KÖSTER IN 7 needs to have contact with water to build foam and for curing.

Both the KÖSTER 2 IN 1 and KÖSTER IN 7 injection resins are installed with the KÖSTER 1C Injection Pump via injection valves called 'Packers' into the crack. Depending on the application, different packers are available:

  • KÖSTER Super Packers are used for all applications from low to high pressure.
  • KÖSTER One Day Site Packers have an extra valve so that the upper part of the packer can be removed directly after injection and the hole plugged. The borehole stays pressure sealed.

System Components:

  • KÖSTER 1C Injection Pump.
  • Packers.
  • Resin.

General information

Uniclass 2015

Pr_20_31_86_27 Epoxy resinsPrimary


C42/155 Crack repairs

Specification data - Epoxy resins

Product Reference

Polyurethane Injection System for Water Bearing Cracks


KÖSTER One-Day-Site Packer, 90 mm

KÖSTER Superpacker

With firmly mounted cone-head or pan-head fittings for pressure injection, galvanized. Available in 10 or 13 mm widths, 85 or 115 mm lengths, insert requirements.

Injection resin

KÖSTER 2 IN 1 Injection Resin

KÖSTER IN 7 Injection Resin

Product Options


- KÖSTER One-Day-Site Packer:

Allows injection works to be completed in one day. Immediately after injecting, the part of the port which protrudes from the wall can be unscrewed and removed. The front part of the port stays in the wall sealing the borehole so that no injection material can flow out of the borehole even under high pressure. The borehole can thus be closed immediately after the injection is carried out. Available in 90 mm lengths.

- KÖSTER Super Packer:

With firmly mounted cone-head (grease nipple) fitting for pressure injection, galvanized. KÖSTER Superpackers are suitable for pressure injection. They are inserted into the borehole so that the rubber seal of the port is completely submerged in the borehole. Then, the port is tightened meaning the rubber seal is compressed which causes it to expand in width thus pressing it onto the wall of the borehole. The cone shaped tightening piece also ensures that the seal is pressed tightly onto the wall of the borehole. This way, the port is installed tightly in the borehole (also available with Pan Head 'slide on' fitting).

Available in 10 or 13 mm widths, 85 or 115 mm lengths.


- KÖSTER 2 IN 1 Injection Resin:

Will cure with or without water, solvent-free, polyurethane injection resin. The one product is used as an injection foam in water bearing cracks and joints as well as a flexible solid-body resin for permanent crack sealing where no water is present. KÖSTER 2 IN 1 can therefore be used at both stages of a typical 2 stage injection process, and is also ideal for situations where it is not clear how wet the crack may be.

- KÖSTER IN 7 Injection Resin:

Water activated, solvent free, polyurethane injection foam. Reacts immediately on contact with water to form a flexible foam, volume expansion up to 30 times.


Third party certifications

  • CE Marking : KÖSTER 2 IN 1 Injection Resin: according to EN 1504:2004 Concrete injection for the elastic filling of cracks, voids and defects