Fissure Sealant is a liquid that is applied to your molar teeth to prevent cavities from forming. Molar teeth have an uneven surface that is prone to trapping food. Some pits and grooves in your teeth can be too small for your toothbrush to reach, creating perfect conditions for the growth of bacteria and the development of cavities. Fissure Sealants will fill these grooves, and even out the surface of the tooth, helping you to maintain a higher standard of oral hygiene.