Water repellent textiles are often high density woven materials made of very fine yarns or common materials with hydrophobic surface treatment. Waterproofing is defined as the property of a material not to be penetrated by fluids. Such fabrics are completely waterproof even under very high pressure. For more details download the CAD file from our cadbull website. This can be used by architects and engineers. Download this 2d AutoCAD drawing file.