DESCRIPTION

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. Waterproofing done with 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 microcracks develop.

Waterproofing with KÖSTER 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 KÖSTER Joint Tape, KÖSTER Injection Resins, or KÖSTER Joint Sealant FS. KÖSTER SB-Bonding Emulsion introduces flexibility to the material.

PROPERTIES

• Positive and negative side waterproofing against pressurized water. 
• Crystallizing waterproofing system. Penetrates into the substrate and creates a chemical and mechanical bond that will last as long as the wall itself - inseparable waterproofing-substrate bond. 
• Open to water vapor diffusion. 
• Resistant against chlorides, sulphates and phosphates. 
• Abrasion resistant. 
• Certified for drinking water environments. 
• Does not contain corrosion promoting ingredients. 
• No VOC, no emissions of environmentally harmful ingredients. Suitable for a wide variety of substrates. 
• Works also on masonry and on very porous substrates like shotcrete, aerated concrete and cinderblock. 
• Suitable for moist surfaces. 
• Substrate does not have to be continually kept wet to cure. 
• Can seal the hairline cracks caused by the shrinkage and settlement of the surface (self-healing). 
• Inhibits salt movement in the substrate when used as a system together with KÖSTER Polysil TG 500. Easy to apply, fast and safe to use. 
• Seamless application. 
• Long pot life

CONSUMPTION

2 - 4 kg/m² Under KÖSTER NB Elastic Grey for swimming pools: approx. 1.5 kg/m² (1 coat) In cases of ground moisture min. 2 kg/m² (2 coats) In cases of non-pressurized water min. 3 kg/m² (2 coats) In cases of pressurized water min. 4 kg/m² (2-3 coats) In cases of negative side waterproofing min. 3 kg/m² (2 coats) Under bituminious thick film sealants approx. 1.5 kg/m² (1 coat)

PACKAGING

W 221 025 25 kg bag

Please note: KÖSTER Bauchemie AG products are available for sale only on the Estonian market.