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KÖSTER waterproofing systems and products are applied worldwide. The headquarters with the main production facilities in Aurich Crystallizing mineral waterproofing against pressurized water (> 13 bar). A sulphate-resistant waterproofing slurry suitable for positive and negative side waterproofing. Negative-side waterproofing 101. A high-pressure spray rig simulates wind-driven rain conditions on a mockup during the retrofit of the Brevard County Courthouse in Viera, Florida. It is a good practice to dampen surfaces prior to applying hydraulic cement. This is also recommended before using cementitious surface coatings. Jul 28, 2020 · Grade 1 – Some water seepage and damp are tolerable depending. on the intended use. Grade 2 – No water penetration is acceptable. Grade 3 – No dampness or water penetration is acceptable. From these categories we can offer designs based on: •Positive side waterproofing. •Negative side waterproofing. •Integral waterproofing..