What to Know About Desiccant Silica Gel Silica gel is a drying agent that often comes in the form of small, clear beads or clear rock crystals placed in small packets made of paper or cloth. These packets are often packaged with commercial products to prevent damage caused by moisture. Clothes (e.g., coats, shoes, and hats) Electronics (e.g., cellphone and camera boxes) Medication or vitamin bottles Foods (e.g., packets of dry fruit and beef jerky)