LeakInject Flex 6870

LeakInject Flex 6870 is a low viscosity, single component MDI-based polyurethane injection resin that swells in contact with water to form a closed cell flexible foam.


  • Penetrates deep into cracks and joints
  • Reacts with water and forms a flexible closed cell foam that accommodates movement of the crack or joint
  • Chemically resistant against water, weak acids, alkali and micro-organisms
  • Excellent adhesion to construction materials (such as concrete, cement, brick, mortar), metal and certain plastics
  • Reaction speed is controlled by varying the amount of catalyst.


  • Water Sealing of Cracks and Joints
  • Walls
  • Floors
  • Concrete Construction
  • Sewers
  • Tunnels
  • Parking Decks
  • Basements
  • Underground Rail Tunnels
  • Any Buried Construction where Water Ingress is not Desirable