Soudal Soudagum Hydro - 1kg Soudagum Hydro kit, contains two foil bags of 500g Soudagum Hydro, a small bucket, application brush, small reinforcing non-woven fleece (15cm x 30cm) and a pair of disposable gloves. The solvent free Waterproof Protective Coating is suitable for a broad range of applications from roof & gutter repair to general sealing and protection of interior and exterior joints, gaps and cracks.