Koster 21- Water Based/ Solvent Free, High Reflectivity Cementitous Waterproofing Coating. New, multi-purpose liquid waterproofing. The name stands for “waterproofing in the 21st century” which the material combines many advantages of different waterproofing products. KÖSTER 21 was designed in order to meet the expectations of the worldwide market, which requires high quality and sustainable waterproofing products today as well as in the future. ISOLCAP is a light weight thermal insulating
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