Koster KD 3 Sealer - Silicate-Water Based Liquid - W 313

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Silicate-water based liquid. The active ingredients penetrate deeply into the substrate and react to form an insoluble compound. The pores are permanently sealed through the crystallization process. Used in combination with KOSTER KD 1 Base and KOSTER KD 2 Blitz Powder for the negative side waterproofing of cementitious surfaces such as internal basement waterproofing. The KOSTER KD System stops flowing water and forms a permanent waterproofing layer on masonry and concrete.

Unit Size

13.2 lb jerrycan (W 313 006)
26.4 lb jerrycan (W 313 012)

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.


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.