You’ve probably had someone try to sell you undercoating for your car. It’s supposed to protect your vehicle from rust and corrosion. Before you hand over your credit card, you should know many mechanics say it’s not needed because auto manufacturers make their products rust resistant anyway.
Your teeth are different, though! They’re susceptible to decay, especially in areas that are tough to keep clean, like back molars. Ask Dr. Kevin Layton about dental sealants, a thin plastic coating he can apply to teeth to make them resistant to decay. Often used for children, they provide cavity protection for adults too.