A sealant is a layer of composite material that is applied to the enamel of a tooth to seal areas susceptible to decay, such as the molar grooves. Application of sealant is painless and does not require anaesthetic.

Dental sealants are effective in preventing new decay from forming and may also intercept the start of decay or even halt its progress.

Dental sealants are made of a durable material that protects a tooth during the period when the risk of decay is highest, namely during childhood and adolescence.