The occlusal surface of posterior teeth (molar and premolar) usually have deep pit and fissure that makes it hard to clean, which make it easier to have tooth decay.
Tooth sealant will make the pit and fissure shallow so you can clean your tooth easier.
Tooth sealant should be done in children with their first molar appear in the mouth and an adult who has a high caries risk.
Treatment time for Sealant
Approximately 5-10 minutes per tooth