Visqueen Zedex Double Sided Jointing Tape is only available from us in the one size of 100mm x 15m in a box of four. This product is is a high-performance double-sided butyl tape used for joining together the overlaps of Visqueen Damp Proof Membranes. It is blue in colour so that it is easy to see once applied. It has fantastic adhesion that is long lasting. It effectively resists moisture and gas to maintain your damp proof system. Before application, ensure that surfaces are both clean and dry to allow for full functionality. For gas proof membranes, the joint should be sealed on top with Visqueen GR Lap Tape, which is also available to purchase from us.