Silica gel is available for purchase from a number of online retailers, including Amazon.com, WalMart.com, The Rust Store and SilicaGelPackets.com, as of 2015. Alternatively, silica gel packets that arrive with everyday items, such as shoes and beef jerky, can be re-purposed instead of simply being thrown away.
Silica gel is available in a number of sizes and containers, each for a different purpose. It is common to receive a better deal on silica gel by purchasing it in bulk. Pricing policies vary by retailer.
Silica gel is a desiccant, meaning that it absorbs water from the surrounding environment. This has many practical applications, including preserving electronics, keeping food dry and preventing rust.