green gobbler ultimate main drain opener | drain cleaner hair clog remover | works on main lines, sinks, tubs, toilets, showers, kitchen sinks | 64 fl. oz. green gobbler a true breakthrough in drain opening technology. its high-density, thickened formula is heavier than water, so it sinks and clings to the blockage and begins working quickly. highly effective against obstructions caused by fats, oils, lint, and hair. green gobbler main drain opener is odorless, non flammable, and safer to use then traditional drain openers. directions: for residential main line drains: 1) pour entire bottle into any first floor toilet. 2) simply flush once to distribute product through pipes. note: best if used during low usage time, such as nighttime. recommended to not use water for several hours after application. for sinks & tubs: 1) pour 1/2 to 1 quart slowly into drain. allow to work for 30 minutes. 2) flush with hot water. for extra tough clogs repeat treatment and allow to sit in drain overnight. flush again with hot water in the morning.