Make sure you re using the most secure labels with Avery mailing labels with UltraHold permanent adhesive. Avery UltraHold adhesive sticks and stays securely better than other basic labels on a variety of surfaces including envelopes cardboard paper plastic glass tin and metal. Proprietary Avery Sure Feed label technology helps deliver a more reliable feed through your printer to prevent print misalignments and paper jams. Created with TrueBlock label material these shipping labels will completely hide everything underneath so that you can cover older information and reuse old boxes and packaging. These 2 x 4 rectangle labels are also completely waterproof and will stay intact even when submerged in water. They are great for food applications as they are temperature resistant and acceptable for food contact. Great for product labels as they can reach grade A barcode readability and can withstand damage from scuffing tearing smudging and up to a year of UV light outdoors. They are also chemical resi