Quick Unclog - Place large opening over plugged opening and pump twice. You'll clean more in 10 seconds with this sink clog than with any other plunger, guaranteed For Slow Flows or Clogged Drains - The sink clog frees up a clogged tub. hair or whatever for sure. Apply to the drain even when the water stops flowing to free the clog in an instant Heavy Duty - Power comes from the pressure you exert on the bellows, forcing trapped air down in the pipeline. It's the same method as a traditional plunger, but with an 8 times greater volume of compressed air Easy cleaning - Our sink unblocker is made with high-end recycled PVC, it cleans itself easily with bleach under running water once you're done using it Pro Tip - If you're cleaning a sink with an overflow, block it with a damp cloth before you start pumping. This prevents air from escaping and makes the process even faster and easier