PolarSafe™ Labels PolarSafe™ Label Strips from Argos Technologies are made from chemically inert polyester with a unique adhesive formulated to adhere to laboratory glass and plastic products. These labels can not only withstand conventional freezing (-80 degrees Celsius), but can also be used for most cryogenic storage applications (-196 degrees Celsius vapor phase nitrogen storage). No need for separate labeling solutions for your cryo-preservation units and your ultra low freezers. The labels can even be used in incubators. Lables are available in a wide range of sizes, allowing you to label your whole experiment permanently, from micro-centrifuge tube to cryovial; microtiter plate to storage boxes.