Flashband is a self-adhesive sealing strip which bonds instantly to provide a permanent watertight seal. Flashband is easily applied using hand pressure only, with no requirement for special equipment for cutting, forming or fixing. Flashband bonds to most building materials including brick, masonry, slates, concrete roof tiles, wood, metal, concrete, terracotta tiles, roofing felt, glass, rigid plastics and more. Porous surfaces need to be primed with a Flashband primer. Applications include repairing lead flashing, sealing valley gutters, mending leaks in drain pipes and guttering, and repairing roofing felt joints on flat roofs.