Waterproofing kit is used to seal shower tray as well as connections between walls and floor. It is recommended for concrete and mandatory for timber flooring. Each kit contains: 4kg tanking liquid, 1l primer, 10m sealing tape, 2 corners, 2 pipe collars. One kit covers 3 m² with 2 coats. If you buy it as addition to any drain or wet room kit You save £40 if you buy kit that covers 3 m² or £80 if buy one which covers 6 m².