Koster NB1 Grey is a BBA certified mineral waterproofing slurry system containing crystallising and capillary-plugging agents for sealing against pressurised water. It can be used for waterproofing against ground moisture, non-pressurised and pressurised water in new buildings and restoration.

It has a watertight (>130 m water head), mineral surface coating with subsequently crystallising agents. 

Waterproofing undertaken with Koster NB 1 Grey is characterised by excellent resistance to pressure and abrasion as well as excellent resistance to chemicals.

Applying KÖSTER NB 1 Grey

Waterproofing with Koster NB 1 Grey should only be carried out on substrates that are free of moving cracks. The addition of Koster SB-Bonding Emulsion to the mixing water or respectively the use of Koster NB 1 Flex raises the ability of the material to retain water and prevents, in cases of unfavourable weather conditions (warm, dry, drought), a premature curing of the coating. Koster SB-Bonding Emulsion also introduces flexibility to the material.

Approvals

Koster NB 1 Grey is approved by the building authorities and tested in accordance to the potable water guidelines.

Specification

  • BBA certified

  • Product code: DMS178

  • Size: 25kg bag

  • Coverage rate: 8m²

Applied as a closed layer, Koster NB 1 is waterproof to pressurized water up to 13 bar, due to its penetration into the structural member, the slurry develops an intense bond to the substrate and the capillaries are plugged. Besides the hydraulic curing of the sealing slurry, crystallizing reactions are activated in the slurry which can lead to a self-healing effect when micro- cracks develop.

Waterproofing with NB 1 Grey should only be carried out on substrates that are free of moving cracks. Moving cracks should be considered construction joints and treated accordingly with Koster Joint Tape, Injection Resins, or Joint Sealant FS.  SB-Bonding Emulsion introduces flexibility to the material.

  • Positive and negative side waterproofing against pressurized water

  • Resistant against chlorides, sulphates and phosphates

  • Certified for drinking water environments

  • Penetrates the surface where crystallization leads to inseparable waterproofing-substrate bond – does not contain corrosion promoting ingredients

  • No VOC emissions

  • No emissions of environmentally harmful ingredients – works also on masonry and on very porous substrates like shotcrete, aerated concrete and cinderblock

  • Substrate does not have to be continually kept wet to cure

  • Inhibits salt movement in the substrate when used as a system together with Koster Polysil TG 500

  • Easy application

  • Long pot life ETA-17/0025

  • Seamless application

  • Suitable for new construction and repair on existing structures

  • Horizontal and vertical waterproofing of concrete, masonry or cementitious plaster, on porous concrete, on shotcrete, in wet rooms, bathrooms, showers, new basements, inside of basements, inside elevator shafts, tunnels, leaking retaining walls, underside of leaking ceilings, tanks, silos, sewage treatment plants, manholes and drinking water tanks

  • Suitable for waterproofing basements (exterior or interior horizontal and vertical surfaces)

  • Possess excellent pressure and abrasion resistance

  • Koster SB-Bonding Emulsion introduces flexibility to the material

NB1 is the perfect solution for waterproofing:

  • Basements

  • Retaining Walls

  • Car Parks

  • Lift Pits

  • Tunnels

  • Reservoirs