KÖSTER Waterproofing


KÖSTER NB 4000 is a polymer modified mineral coating for waterproofing building structures inside and outside. It is resistant to rain soon after application and can be exposed to pressurized water after 24 hours. It is viscoplastic and crack bridging. KÖSTER NB 4000 is free of bitumen, UV stable, and can be used for adhering insulation boards. It can be applied to slightly moist substrates, can be painted and stuccoed over with foundation base plasters.