KÖSTER BAUCHEMIE AG develops, produces and supplies a comprehensive range of special construction materials in the areas of waterproofing and concrete repair. Being founded in 1982 in Germany, the KÖSTER Group consists of 24 companies which are represented in more than 45 countries. It is our policy to offer construction materials of highest quality, durability and general performance. As the North American subsidiary, KOSTER American specializes in moisture vapor control systems, cementitious underlayments, waterproofing for concrete block and masonry substrates and oil removal systems. We have been successfully solving water vapor and alkalinity transmission problems in flooring for over 20 years, and offer professional advice and technical support for your flooring needs.