The purpose of this double-sided mastic tape is to repair damaged pond liner or join pond liners together. This product can be used on either wet or dry pond liner. The tape hardens over time and the repair should last as long as the liner. Also available as a full 10m roll and will work with any of our pond liners. Instructions for use: 1. The tape is double sided and can be used on either side. 2. Leave the tape attached to the wax backing tape and cut to size. 3. Once in place remove the backing paper. 4. Press a patch of liner or the liner that is to be joined into the tape, or leave to harden without patch. Leave for 24 hours to harden.