Caustic Soda has a variety of applications, including unclogging drains and creating soap. This is commonly used as a drainpipe cleaning, to unclog drains, to remove grease buildup from ovens, and to manufacture soap and detergents. It is ideal for drain cleaning and is commonly found in drain cleaners for both home and industrial use. Caustic Soda is marketed for use in the production of candles and soap. Lye is used to making soap, candles, homemade biodiesel, glass icing, a variety of dishes, and chemistry experiments.