Sealants can be clear or appropriately tinted to assist identification after being applied to the pits and grooves. They are usually applied to the back teeth which are most decay prone. Fluoride is effective in preventing decay on the smooth surfaces of the teeth. It is far less effective, however in the tiny areas to which sealants would be applied. Sealants are recommended for all children with deep grooves in back teeth.
Sealants are normally effective for several years.
They cannot be properly examined with just the naked eye. Your dentist will monitor the state of the sealants over the years and let you know if and when they should be redone. Longevity of sealants greatly depends upon eating habits. Cleaning of the teeth to be sealed. Application of the sealant material which quickly hardens.