It is easily applied using hand pressure only, with no requirement for special equipment for cutting, forming or fixing It bonds to most building materials including brick, masonry, slates, concrete roof tiles, wood, metal, concrete, terracotta tiles, glass, roofing felt, rigid plastics Applications include repairing lead flashing, sealing valley gutters, mending leaks in drain pipes & guttering & repairing roofing felt joints on flat roofs.