Earthmate BASALFAB® Hi-Vis Orange PP Silt Tapes Woven Geotextiles are manufactured with highly visible Polypropylene Silt Tapes which are resistant to ultraviolet resistance, rotting, biological degradation and all natural soil bases, acids, alkalis. It is stable within a pH range of 2 to 13. Earthmate BASALFAB® Hi-Vis Orange PP Silt Tapes Woven Geotextiles are used for warning layer and separating contaminated uncontaminated soils in civil engineering and construction projects.