These tamper-evident labels are designed to securely seal cardboard and polypropylene cryo boxes. Ideal for short and long-term storage in liquid phase and vapor phase liquid nitrogen (-196°C/-321°F), low-temperature lab freezers (-80°C/-112°F), and for transportation on dry ice. Durable and waterproof, these secure cryo box labels have a sturdy design to prevent accidental seal ruptures during storage or manipulation, but will clearly deteriorate upon any attempt to remove the label. The labels are also resistant to spraying with alcohols and detergents, and rubbing with surface sanitizing wipes.