NB1 Grey is a watertight mineral waterproofing with subsequently crystallizing agents. Suitable for positive side and negative side waterproofing. Approved by building authorities and tested in accordance with potable water guidelines. For area waterproofing in new construction and restoration, e.g. waterproofing of basements and tanks.
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KÖSTER NB 1 Grey is a mineral coating containing crystallising and capillary-plugging agents. It can be used for waterproofing against ground moisture, and for non-pressurized and pressurized water.
Tanking completed using KÖSTER NB 1 Grey is characterized by excellent resistance to pressure and abrasion as well as chemical and sulphate resistance. Applied as a closed layer, KÖSTER NB 1 Grey is absolutely 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.