Desiccant packets provide an economic and effective way of protecting against moisture damage during transit and storage. They work by adsorbing and trapping moisture in the air, which in turn lowers humidity and prevents the formation of rust, mould & mildew, as well as minimising spoilage rates in food products. The protection against moisture is achieved by sealing the item in a suitable airtight container together with the appropriate sized desiccant packet. Desiccant packets are suitable for protecting electronic equipment, cameras, tools, computers, musical instruments, preservation packaging, food & pharmaceutical, and all humidity sensitive products. Shelf life for silica gel packets in original (unopened) packaging is 2-3 years.