Drano® Kitchen Granules has a powerful formula that heats water to quickly melt grease clogs in your kitchen sink. It's designed to destroy your tough, greasy kitchen clogs. Clogs happen, but with Drano®, you and your drains are unstoppable. Not for use in sinks with a garbage disposal. Application: Drain Cleaner; Applicable Material: Sinks; Chemical Compound: Sodium Hydroxide; Dirt Types: Grease.