Fissure sealants are a resin coating that is teeth coloured and applied to the teeth to help bonding in the grooves of your teeth (or the technical term for those grooves – fissures).Yes, that’s right, a groove sealant, is what will sit in the pit of your teeth to stop decay forming.The primary cause of tooth decay is due to the acid produced by plaque (bacteria) trapped in the groove. Ensuring your teeth are protected by fissure sealants will prevent plaque build-up within the fissures and hence prevent decay.