Security labels on A4 sheets, self-adhesive, made of special white film with safety adhesive. Perfect for sealing documents, devices/appliances, and data storage media. As a guarantee and maintenance seal, a test badge, or a label for original products. No attempt at manipulation is missed because residue cannot be transferred to other objects and is visible if removed. Temperature-resistant, oil- and dirt-repellent, tear-resistant, and not meant for outdoor use. Adhesion time minimum: 30 minutes. Not recommended for easily split materials (like paper, cardboard, etc.) or synthetic materials that include plasticizer. Testing is advised for substrates (like polypropylene) that have poor adhesion. Processing is trouble-free because of the optimal flatness and all-around protective edge. *For copiers and laser printers. * Not recommended for use with color copiers, color laser printers, or inkjet printers.