Decay starts early in life, so dental sealants are generally placed on your teeth at a young age.
The first set of permanent molars usually erupts by age 6. Sealing these chewing surfaces soon after will help keep them healthy and protect them from cavities. Much later, second molars erupt during the rapid growth spurts of teenagers. These molars are just as vulnerable as the first, and the typical teenager will subject them to excessive sugar. The sooner these chewing surfaces can be sealed, the better.
Although dental sealants are usually applied early in life, adults at high risk of developing decay can also benefit from receiving them. Consult with your dentist to determine if tooth sealants are right for you.