Denso Petrolatum Tape was introduced to the UK by a company called Paul Winn & Co in 1929. Initially the market was aimed at the gas industry for wrapping underground pipes – until this time hot applied bitumen and pitch troughing systems were used. By being applied cold, Denso Tape had distinct operational advantages over the existing systems and sales grew steadily with the product being accepted and used by most of the Public Utilities. When World War Two broke out in 1939, Denso Tape was widely used for gas proofing rooms, waterproofing military vehicles, landing craft and used for the repair of bomb damaged services.