Fixman 190288 Roll 50mm Aluminium Foil Tape is 45metres long. Aluminium tape 50mm roll is ideal for adhering, joining and repairing insulation, pipework, ducting, plumbing, construction, heating and ventilation work. So, the tape creates a waterproof barrier to prevent water leaking. As well as being flame retardant for safe use around fire risks. Can be used internally or externally thanks to the UV resistance. Highly flexible to mould around odd shapes creating an air and watertight seal. For use in temperatures from -20 to 100°C. The tape is 50mm and 45m roll.