Cracks in the building substance are structurally weak points. Additionally, penetrating water may cause damage and may reduce the usage and lifetime of the building. An elastic sealing or structural-bonding of the crack is required. In order to achieve this, the crack is filled over its entire course with a polyurethane injection resin via pressure injection. The injection resins which are applied can also be used in drinking water environments.

Show references

Elastic and structural crack injection by pressure injection on dry or wet cracks

Dry and wet cracks can be sealed permanently with KÖSTER injection materials. KÖSTER 2 IN 1 is the standard material for waterproofing cracks. The material forms a foam when it comes in contact with water displaces it from the crack. After stopping the water ingress, a second injection using the same material permanently and elastically waterproofs the crack.

KÖSTER KB Pox IN is a low viscous epoxy injection resin that can be used for structural re-bonding in dry or wet cracks.

KÖSTER IN 5 is a very low viscous polyurethane injection resin with a very long pot life. It is especially suitable for injection into very small and fine cracks.

KÖSTER Micro Grout 1C is a mineral injection material which is ideal to fill voids and cracks of medium width. The material has excellent adhesion properties even to damp substrates. It also possesses a very high compressive strength after curing.

All KÖSTER 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 Impact Packers are installed very quickly and are recommended for low to medium pressure.

The KÖSTER Superpackers are used for all applications injecting from low to high pressure. KÖSTER One-Day-Site Packers have an extra one-way return valve. The bottom portion of the packer prevents the injection material from flowing back out of the wall, so that the upper part of the packer can be removed directly after injection and the borehole stays pressure sealed. The drill hole can be sealed immediately after the injection works.

Always adhere to the specifications in the respective Technical Guidelines.

Pressure injection of water bearing cracks

KÖSTER 2 IN 1 is a broadly applicable solvent-free PU injection resin for dry and water bearing cracks. The specialty: KÖSTER 2 IN 1 forms an elastic foam when coming into contact with water which pushes the water out of the crack. If no water is present, the material forms an elastic solid body resin and permanently seals the crack.

Alternatively, KÖSTER IN 8 reacts only when in contact with water and spontaneously forms a compact, viscoplastic, waterproof polyurethane foam with a volume expansion of up to 30 times, which allows movements of the structure while maintaining a watertight system.

All KÖSTER 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 Impact Packers are installed very quickly and are recommended for low to medium pressure.

KÖSTER Packers and KÖSTER Superpackers 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.

Always adhere to the specifications in the respective Technical Guidelines.

Waterproofing of construction joints in the wall/floor junction

For retroactive waterproofing of the wall-floor junction, the boreholes have to be drilled transecting the construction joint. The borehole should be drilled approximately into the middle of the construction joint.

In case of flowing water or when it is not certain if the crack is dry or wet, KÖSTER 2 IN 1 is injected. KÖSTER 2 IN 1 is a unique CE certified product, which in dry cracks forms a solid body resin, in wet cracks a water replacing foam. This saves time and logistics on the construction site. It is injected twice, 10 – 20 minutes apart, to ensure that the joint is permanently and elastically sealed.

Alternatively, KÖSTER IN 2 is a solvent-free, 2 component polyurethane injection resin which stays permanently elastic, allowing a permanent joint sealing even in case of movement of the structure.

All KÖSTER injection resins are installed with the KÖSTER 1C Injection Pump via injection valves called “Packers” into the cracks or joints. Depending on the application, different packers are available.

The KÖSTER Superpackers are used for all applications injecting from low to high pressure. KÖSTER One-Day-Site Packers have an extra one-way return valve. The bottom portion of the packer prevents the injection material from flowing back out of the wall, so that the upper part of the packer can be removed directly after injection and the borehole stays pressure sealed. The drill hole can be sealed immediately after the injection works.

Always adhere to the specifications in the respective Technical Guidelines.

Waterproofing of construction joints via an injection hose

1 Injection hose

2 Injection Resin
KÖSTER IN 5
3 Pump
KÖSTER 1C Injection Pump

Construction joints, especially in wall-wall and wall-floor junction, when installed underneath ground level, always need particular attention when it comes to waterproofing.

Defects in this area are not uncommon. Before pouring the concrete for the wall, injection hoses are installed in the construction joint. These hoses are usually perforated or slotted. After the concrete has cured, an elastically curing resin is pressure injected into the injection hose. The joint is now permanently elastically sealed and waterproofed.

For the application via injection hose, KÖSTER IN 5 is the product of choice. KÖSTER IN 5 is an EN 1504-5 certified resin with a low viscosity and an outstandingly long pot life, suitable for the injection into dry and moist cracks or joints. These two aspects are very important for the application so the product has enough time to enter the small and fine voids and doesn’t start to react during the injection.

All KÖSTER injection resins are installed with the KÖSTER 1C Injection Pump either through packers, or in the case of injection hoses, through special units placed on the walls.

Always adhere to the specifications in the respective Technical Guidelines.

 

 

 

Back

Top
Albania Austria Bosnia and Herzegovina Brasil Bulgaria China Croatia Czech Republic Denmark Finland Germany Ghana Greece Hungary Italy Japan Kazakhstan Kuwait Latvia Lebanon Macedonia Mexico Netherlands New Zealand Norway Panama Poland Portugal Romania Russia Senegal Serbia Slovakia Slovenia South Africa Spain Thailand Turkey Ukraine United Kingdom United States of America