Our pipe unclogging powder (box) contains lemon extract, cyanuric acid chloride and surfactant. It can keep your pipes clean. Economical type, one bottle can be used multiple times. Its usage method is very simple: Pour an appropriate amount of powder into a clogged sink or drain pipe and wait for 15 to 30 minutes for it to dissolve. Rinse the drain pipe with hot water to remove the blockage. And it takes effect immediately after use, restoring the unobstructed flow of the pipeline.