Our pipe unclogging agent effervescent tablets (boxed) contain sodium hydroxide and aluminium powder. It can effectively unclog sewers and quickly dissolve hard-to-remove sewer substances such as hair and grease. Its usage method is very simple: Dissolve the pipe unblocking agent effervescent tablets in a basin of warm water. If the sink is clogged, first drain the accumulated water, then pour the unblocking solution into the pipe, wait for 15 minutes to dissolve the dirt, and then rinse it with a large amount of hot water. It can automatically decompose stains, adhere to pipes, prevent the generation of odors, keep pipes unobstructed, and remove the most stubborn blockages in drainage pipes.