Koster Injection Gel G4 is a low-viscosity, water-based acrylic gel made for curtain injection and sealing masonry against water ingress. Designed for waterproofing below-ground structures, it can be injected into fine pores and mortar joints, and is suitable for both new builds and repairs. Swells after curing to absorb extra water and is applied with a 2-component injection pump.

  • Lo- viscosity acrylic gel for injection into masonry and below-ground structures

  • Highly elastic and water-binding during gelation

  • Swelling ability after curing allows 10% water uptake

  • Easy, seamless application and fast curing

  • Can be injected into fine substrate pores

  • Drinking water certification

  • Pot life of 24 hours for mixed components

Applications

  • Waterproofing basements

  • Curtain injection for below-ground construction

  • Sealing full brick masonry and mortar joints

  • Special waterproofing projects such as tunnels and shafts

  • Void injection in masonry

Availability

21.4kg container

Performance

Minimum application temperature +5°C

Pot life (mixed) 24 hours

Storage life (unopened, cool) minimum 12 months

Installation

Injected using a 2-component injection pump with integrated water flush

Concentrate diluted with local tap water before use

Protective clothing, gloves and safety goggles required during application

Clean pump and machinery immediately after use with clean water

Accreditations

Drinking water certification