<p>A folding closure member for closing the end of multi-wall hollow sheeting which may be supplied on a roll and is fixed by means of a liquid or semi liquid adhesive which flows into the previously created cavities and troughs of the surfaces of the closure members and exterior surfaces of the outer walls of the sheeting. Once folded and squeezed together it forms substantially a 'U' shape and provides a secure water impermeable bond and seal between the UPVC and sheeting surfaces which are extremely difficult to bond to for prolonged periods. There is also attached a filter tape which lifts as the wings are folded into and glued into position position.
</p>
