life expectancy: Average service life or functional period in years, assuming regular maintenance.
pot life: The time interval following the addition of an accelerator before a chemically curing material will become too viscous to apply satisfactorily. See also shelf life.
remaining useful life: A subjective estimate or educated guess made by the inspector based upon his/her observations and experience as to the number of years that a component will continue to be functional before needing replacement.
shelf life: Used by manufacturers of glazing and sealants to refer to the length of time their product may be stored before beginning to lose its effectiveness. Shelf life and the necessary storage conditions are typically printed on the product package.
work life: The time during which a curing sealant remains suitable for use after being mixed with a catalyst.