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What Is A Sealant And What Is It Used For?

Posted on 2/2/2026 by NC Pediatric Dentisty

Girl getting dental sealants

Have you ever heard of a superhero for your teeth? Well, there is something pretty close! It's called a dental sealant, and it's a fantastic way to protect your teeth from cavities. Think of it like a shield that keeps the bad guys (bacteria and food particles) away.

# What Exactly is a Dental Sealant?

A dental sealant is a thin, plastic coating that a dentist or dental hygienist paints onto the chewing surfaces of your back teeth, also known as molars and premolars. These teeth have lots of little grooves and pits where food and bacteria can easily get stuck. Even with careful brushing, it can be hard to clean these areas completely. The sealant fills in these grooves, creating a smooth surface that's easier to keep clean.

# Why Are Sealants Important?

Cavities are caused by bacteria in your mouth that feed on sugars and starches from the food you eat. This process creates acid, which can erode the enamel (the hard outer layer) of your teeth. Molars are especially vulnerable to decay because of their shape and location in the mouth. It's difficult to reach all the nooks and crannies on these teeth with a toothbrush.

Dental sealants act as a barrier, preventing food and bacteria from coming into direct contact with the enamel. This significantly reduces the risk of cavities, especially in those hard-to-reach areas. For children and teenagers, who are more prone to developing cavities, sealants are a particularly valuable preventative measure. However, adults can also benefit from sealants, especially if they have a history of tooth decay or deep grooves in their teeth.

# How Are Sealants Applied?

Getting sealants is a quick and painless process. First, the dentist or hygienist will thoroughly clean and dry the tooth. Then, they will apply a special solution that slightly roughens the surface of the tooth, which helps the sealant bond better. After a few seconds, the roughening solution is rinsed off and the tooth is dried again.

Next, the dental sealant material is painted onto the chewing surface of the tooth. A special blue light might be used to help the sealant harden quickly. The whole process usually takes just a few minutes per tooth. You won't feel any discomfort during or after the procedure.

# How Long Do Sealants Last?

Sealants are not permanent, but they can last for several years with proper care. During regular dental check-ups, the dentist will examine the sealants to make sure they are still intact and functioning properly. Over time, sealants can wear down or chip, so they may need to be reapplied. Think of it like a protective coat of paint that needs to be touched up every now and then.

# Are Sealants Just For Kids?

While sealants are commonly placed on children's teeth soon after their permanent molars come in, adults can also benefit from them. Anyone with deep grooves or pits in their teeth, or who is prone to cavities, can be a good candidate for sealants. Talk to your dentist to see if dental sealants are right for you or your family members. It's a simple and effective way to keep your smile healthy and bright!

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