Description Within one minute, when these dry, odorless and powerful coated crystals are activated by hot water, the toughest drain blockages are cleared. Swift even tackles small drains, grease traps and septic system. Dissolves grease and hair in less than 1 minute when used as directed. Non-acid. Will not harm: plumbing fixtures, porcelain or septic systems.  (M)SDS  Product Information