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KOSTER Siloxan is a façade waterproofing for cementitious and masonry building materials which is transparent after drying. It is especially suitable for brick and natural stone. It penetrates very deeply even into building materials with low porosity. The material is highly alkaline-resistant and may therefore be applied to fresh cementitious and masonry substrates.
KOSTER Siloxan protects buildings from driving and normal rain water; is water vapor permeable and resistant to frost and de-icing salts.