Drano Dual-Force Foamer Clog Remover is a unique deep-cleaning foam that attacks clog causing build-up. This expanding foam reaches where other liquids can't to remove hair, gunk and other sources of odor from pipe walls. Use Dual-Force Foamer Clog Remover for effective drain cleaning that won't harm your pipes or septic systems. Clogs happen, but with Drano you and your drains are unstoppable.