Nepheline syenite and feldspar powders are chemically inert inorganic materials — they do not undergo chemical degradation over time.
Technical Details
In proper storage conditions, the shelf life is essentially indefinite from a chemical standpoint. However, physical degradation can occur: moisture absorption leading to caking (hard lumps form when surface moisture acts as a binding agent between particles); compaction from stacking pressure (bottom bags in a tall stack may compact into hard blocks); and contamination from insects, rodents, or environmental dust in poor storage facilities. Best practices for maintaining quality: store in enclosed, dry warehouse with roof protection from rain; maintain off-floor storage using pallets; limit stack height to 3 layers for jumbo bags, 8-10 layers for 50kg bags; practice FIFO (first in, first out) inventory rotation; and for storage beyond 12 months, periodically check for moisture and caking. If caking occurs, the powder can usually be restored by breaking the lumps and re-screening — the chemical composition is unaffected. Our products are supplied with production date on each bag for traceability and FIFO management..
Practical Application
