Seal labels made of non-ageing polyester foil with extra-strong adhesive. Securely seals packaging as original closure, e.g. for bulk products, mail-outs, and many other uses. Also suitable for critical surfaces such as cardboard, and also for labelling damp surfaces. It is possible for the sub-surface to be damaged if the label is later removed. For easy labelling wih pencil and foil pens.