Cryogenic cover-up thermal-transfer labels designed for applying to already frozen cryo vials and tubes, which serve to conceal any existing, inaccurate, or out-of-date information. Ideal for quick re-labeling of frozen vials and tubes when removal of the existing label is not possible, and the sample container is temperature variation sensitive. These cryo cover-up labels will completely obscure the existing label and block-out the information underneath. The re-labeled frozen vials can immediately be stored back inside liquid nitrogen (-196°C/-321°F) or a freezer for long-term preservation. Printable with all common brands of thermal-transfer printers, the crisp, smudge-proof printout obtained is also resistant to most common laboratory chemicals and detergents. On vials and tubes, it is recommended that blackout CryoSTUCK® labels are applied with an overlap of at least 0.25″ to ensure proper adherence to the frozen surface.