I used puncture repair once whilst touring, did not work, in the end I got storm proof gel, whatever you use like a gel based glue works well. The trick is to deflate the pad, use your mouth to deflate more by sucking the air out, close off the valve then put your glue on the hole and the vacume created by sucking out the air will cause air to be sucked in by the puncture hole thus sucking in the glue giving you years of peace of mind as the hole will now be sealed