Tamper-evident design: If someone tries to remove this tape from product packaging, there will be an obvious tear that can't be corrected; Compared with only 50-60% partial transfer feature, our security prints or patterns will be totally transferred to the application surface if sticker is removed, this irreversible change provides remarkable evidence of unauthorized access, then keeping your asset Secured Convenient size: The size of this Tamper Evident Label is 1 x 3.35 Inches; The small size can seal envelopes and product packaging well; Whether you are packaging handmade goods or want to mail confidential information. Waterproof: Different from other label seals with thin anti-counterfeiting "void" film, our anti-counterfeiting seal obtains an anti-counterfeiting "void" film that is more than twice as thick; Very thick and durable; They have a reflective luster like foil, which can help them stand out; Even if water drops on them, the material can hold it well, and is resistant to moisture, light, scratches, heat and chemicals Confidentiality :You can fill in the signature, time, and a small part on the label. You can fill in a custom number or mark to provide maximum security. Fits most surfaces: These High Security Tamper Proof Stickers are made of permanent adhesive and will be very strong when placed on a flat surface; The label can be applied on almost any surface: boxes, cans, envelopes, plastic, glass, paper, metal, wood and cardboard-no sticky residue;also including LOW energy surface such as pressed or uncoated paper board, light texture polypropylene, deep texture polypropylene, heat shrink film (PE; PVC), Stretch Wrap Film (LLDPE) etc. Used to seal non-reusable boxes or packages, traces of security print or pattern will be totally transferred to the applied surface if these security stickers are removed. The stickers can be attached practically to almost everything - doors, counters, computers, shop windows, equipment, boxes, cells, safes, cabinets, exhibitions, envelopes, documents, etc. Before applying the stickers it is necessary: Shipping: Labels must not be exposed to temperatures over 100°F (37°С) during shipment or storage. Temperatures over 100°F can damage the labels and shorten the shelf life. Recommended Application: 1.If needed, clean the application surface with 90% Isopropyl Alcohol prior to affixing the label. 2.Apply security label to the clean & dry surface at or above the recommended application temperature. Notes: On the recommended surfaces at 70°F, the tamper evident feature should be functional within 1 minute of application. Other surfaces or lower temperatures may require more curing time. If the tamper evident feature does not perform immediately, more curing time usually improves the performance of the tamper evident feature. For best results, allow 1 hour curing time after application. General Minimum Application Temperature: +40°F. General Service Temperature Range: -40°F to +160°F. Storage: 1.Storage Temperature: 40°F to 100°F. 2.Storage Humidity: 20% to 60%. 3.Minimum Shelf Life: 2 Years. To use this item better, pls download Technical Specification at bottom by yourself.