In most restrooms odor containment is a must. Besides daily and thorough cleaning of floors, fixtures and other items, the flooor drain is often forgotten to be a source of odors. When drain traps dry out or when drain trap primers fail, there is no more seal against sewer odors once the water in the trap evaporates. Now there is a simple solution: add some water into the floor drain and add 3 to 6 oz. of EverPrime, depending on the trap size, into the drain as well. EverPrime is specially formulated to be biodegradable and to not evaporate. It will keep a permanent liquid seal unless flushed out.