description A powerful, compact liquid pipe cleaner that is effective in small amounts with its highly concentrated gel formula. 99% effective for antibacterial. Can adhere in drain pipe inner surface, strongly dissolve the oily stain, rust, tea residue, and hair, remove silt and odor in pipe speedily. To eliminate odor and prevent blockage, use 50ml. To unplug blocked sewers, use 150ml and leave in for 15-30 minutes. Rinse with water afterwards.