Koster KD System - Package For Negative Side Waterproofing - W 219

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System package for the negative side waterproofing of cementitious surfaces against pressurized water such as internal basement waterproofing. The KOSTER KD System stops flowing water and forms a permanent waterproofing layer on masonry and concrete. All components of the KOSTER KD System in one package.

KOSTER KD 1 Base Fast curing mineral sealing slurry with excellent resistance to aggressive ground water and high water pressure.

KOSTER KD 2 Blitz Highly reactive powder with extremely short setting time. With application of the powder, active water leaks are sealed in seconds.

KOSTER KD 3 Sealer Extremely low viscosity silicifying liquid. The active ingredients penetrate into the substrate and react to form an insoluble compound. The pores are plugged and permanently sealed through the mineralization process.

Fields of Application The KOSTER KD System can be used for waterproofing against pressurized or non-pressurized water from the positive or negative side. KOSTER KD 2 Blitz can also be used for sealing and closing cracks before injecting with KOSTER injection resins.

Substrate The substrate must be sound, solid, and free of oil, paint, and loose particles. Plaster and similar products must be removed down to the solid base building material (masonry/concrete). Masonry joints must be raked out 3/4-in deep. Dry substrates must be wetted thoroughly before application of the materials. Fill holes and open joints with KOSTER Repair Mortar or KOSTER Waterstop. On CMU or on softer vertically perforated brick, apply a sound plaster of KOSTER Repair Mortar. 


KOSTER American Corporation is a subsidiary of KOSTER Bauchemie AG of Germany.

Founded in 1982 KÖSTER BAUCHEMIE AG specializes in the development and production of high-quality waterproofing products and systems. Today, KÖSTER forms a group of more than 20 companies with worldwide activities in more than 50 countries. Its headquarters are located in Aurich, Germany.

Our R&D facility, production and technical department are all located on the same campus in Virginia Beach, VA. This allows each department to work closely together to ensure each product conforms to the highest standards of quality. 

KOSTER operates two production facilities in Virginia Beach. The liquid facility produces all of our epoxy coatings while the powder facility produces our self-leveling underlayments as well as other cementitious waterproofing products. 

We place tremendous value on producing our products ourselves in order to ensure the highest level of quality control from development to application. We strongly believe in providing our customers with an excellent and safe experience with our products.