Most bagged, hydrated lime has a shelf life of 12 months once kept dry
and sealed. Once opened bags should be used straight away or resealed so as to
be airtight. Some premixed lime mortars with additives may have a shorter shelf
life.
Lime putty will last indefinitely once kept
underwater and airtight. For most uses the older the putty the better the
finish will be achieved. Lime putty should however be protected from frost whilst
stored.
