About this item EFFECTIVE CLOG REMOVER: Vacplus sink uncloggers feature a powerful formula, which can quickly degrade hair, food waste, grease, and toilet paper, helping you out of the clogged drains and pipes. For slight clog, please leave it still for 15-30 Mins. For stubborn clog, leave it still for over 12 hours before flushing. NO MESS: Each package contains 12 pre-measured powder packs. Being individually wrapped, Vacplus sink clog removers are handy-to-use and easy to store. MILD INGREDIENTS: Vacplus shower drain cleaners are made of powerful yet mild ingredients that are safe for almost all pipes and septic systems. They are non-toxic and contain no bleach or harsh elements at all. (Note: Like most drain cleaners, Vacplus bathroom sink clog removers contain chemical ingredients that can be harmful if swallowed or in contact with the skin or eyes.) INSTRUCTION TIPS: For clogged sinks, empty the standing water first, and then use the product to clear it. Otherwise, it will be invalid. In addition, when there is a severe blockage, do not pour two packs of product simultaneously, and please run each pack ten minutes apart. WIDE APPLICATION: These multi-purpose sink clog removers features a non-acid, biodegradable formula that is safe for various types of pipes, no matter metal or plastic pipes. You can rest assured that they are suitable for your kitchen sinks, bathroom tubs, showers, floor drains, urinals, RV drains, and more.Not suitable for toilet unclogging