Sometimes when people need to seal a counter they want to do so quickly and without having to have a ton of chemicals and other items inside of the home for any length of time. While that is a great idea, it can also be a challenge as well because so many of the sealers are heavily chemically laden or require a lot of time to dry.
There seems to be a lot of confusion as to whether natural stone should be sealed or not. Although there are some stones that definitely need to be sealed, some countertops installed for use in homes do not. The stone industry tends to apply a blanket approach to all stone advocating sealing all stone and applying sealant often. Part of why granite tops are so desirable is due to their natural uniqueness and individual charm.