This Foamstrip fills up expansion joints. You have to combine it with the Hydrokit/Aqua Sealant for a watertight finish of your floor. If you want to ensure your flooring wet warranty, the watertight finish is the way to go.
Resealable aluminium bags packed in cardboard boxes. Average usage: 16 kg for 13-16 m². Read the instructions before you get started. Check if the glue is compatible with your subfloor.