Drainage a.b.e.® Construction Chemicals‘ range of Waterproofing Drainage Products consists of: bidim® flashpack®Non-woven, continuous filament, needle-punched, polyester geotextile. flashpack ® is a DIY retail pack of bidim®. High strength & high conformability.bidim® (geotextile fabric) U14non-woven, continuous filament and needle-punched, polyester gesotextile used for drainage behind retaining walls and filtration in subsoil drains Additional Information Conversion Tables Formulae Trigonometry Tables Heath & Safety