Soudal Butyband is a strong, flexible, self-adhesive flashing tape suitable for general purpose waterproof sealing around of skylights, downpipes, guttering, leaking roof columns, roof-lights, extractor vents and much, much more. First, ensure the surface is sound, dry, clean and from dust and then apply the flashing tape. Benefits: Replaces need for lead flashing Self-adhesive requires no separate glue Quick and easy to apply Areas For Use: -Sealing and joining materials such as glass, steel, plexiglas, polycarbonate, wood, aluminium and PVC -Sealing of conservatories, porches, gutters, piping, ducting, canopies, roofs, chimneys, skylights and light domes