Floor Sealer is like a disposable wear layer between you and your wooden floors. It helps protect the timber underneath, as well as being responsible for that beautiful new floor gloss. Over a period of time, you will wear away this layer through general day to day traffic. Little tiny bits of dirt and sand on your feet will slowly wear away your finish and cause it to look dull and lifeless. At this point, it's time to apply another coat of sealer!
A regular household with kids will probably need to re coat every 6 to 12 months. A handy tip to extend the life of your finish is to ensure you have a heavy mat at every entrance to the house so you're not walking impurities onto the floor.