UJ kits are designed and manufactured so that they can be stored for long periods and still be usable (provided they have not been opened and stored properly). However, some kit components, e.g. adhesives, may have a defined shelf life, and, if expired, these should be replaced before use.

A list of the adhesives products and their shelf life is published on the consortium website and the UJ & UQJ Explorer Disc in section {UJ manual 01, GENERAL}