Thorns! Thorns everywhere! The surface on the Cape Epic through South Africa often resembled a nail board. On one stage, the tester's tyres went "whoosh!" seven times. But only briefly. Then the hole was closed. Thanks to Schwalbe's sealing milk, ideal for inner tubes. Simply pour it over the valve as a preventative measure (note: not possible with all valves) and off you go. Incidentally, the tester is still riding the punctured inner tube.
Web: www.schwalbe.de