A band that can be stored in reel format, which has areas coated by a thermally-activatable adhesive material following a coating pattern that is repeated along the band, said band having a front face, a rear face and two optionally parallel longitudinal edges, said band being characterised in that the coating pattern, on the same rear face of the band, comprises at least two main transversal strips that extend between the two longitudinal edges of the band and that include areas coated with a grammage of thermally-activatable adhesive material between 35 and 130 gr/m2.