Dental sealants for kids: cavity prevention
Sealants are plastic coatings that prevent cavities on chewing surfaces. They're inexpensive, safe, and highly effective.
Medically reviewed by Dr. Jose, DDS — June 9, 2026
Sealants are one of the most cost-effective ways to prevent cavities in children.
What sealants do
- Block bacteria and food — seal deep grooves on chewing surfaces
- Substantially reduce cavity risk on sealed chewing surfaces- Last for years — checked at regular visits and reapplied when worn
- Apply in 1 visit — quick, painless process
Best time for sealants
- Age 6–7 — when first molars erupt
- Age 11–14 — when second molars erupt
- Also for premolars — all chewing surfaces can benefit
- Some adults benefit too — especially if cavity-prone
The procedure
- Clean the tooth — remove plaque
- Dry completely — sealant must bond to dry surface
- Apply sealant material — thin plastic coating
- Cure with UV light — hardens in seconds
- Done — no numbness, no pain
Effectiveness
- Most effective on molars — their deep grooves are where sealants shine
- Long-lasting — your dentist checks them at each visit and reapplies when needed
- No drilling or injections — purely preventive
Cost vs. benefit
A sealant costs a small fraction of what a filling costs — and far less than the time, stress, and follow-up a cavity brings. Ask your dentist’s office for the per-tooth sealant fee and compare it to their filling fee; the math usually speaks for itself.
After sealants
- Brush and floss normally — sealants don’t replace hygiene
- Regular checkups — dentist monitors sealant integrity
- Avoid hard/sticky — same as always
- Replacement when needed — your dentist will tell you when they’ve worn
Insurance
- Often fully covered — for kids under 18
- Check your plan — most major plans cover sealants
Sealants are an inexpensive, proven way to prevent cavities. Ask your child’s dentist about them at the next visit.
Frequently asked questions
Are dental sealants safe for kids?
Yes. Sealants are FDA-approved, painless, and have been used safely for decades. No drilling or needles required.
How much do sealants cost?
Sealants are one of the least expensive preventive treatments a dentist offers, and many insurance plans cover them for children — ask your dentist's office for the per-tooth fee and to check your plan. A sealant typically costs far less than the filling it can prevent.