Colgate PreviDent Brush-On Gel — 1.1% Sodium Fluoride Prescription Gel

Colgate PreviDent Brush-On Gel is a prescription 1.1% sodium fluoride gel — the same prescription-strength fluoride as 5000 ppm toothpaste, in an easy brush-on gel format. It strengthens enamel and helps prevent cavities for people at elevated decay risk, and is a good option for anyone who prefers a gel over a paste.

At 1.1% neutral sodium fluoride (about 3.4× the fluoride of regular toothpaste), the gel remineralizes enamel and helps reduce sensitivity. The brush-on format applies directly with a toothbrush — no special trays required — making it simple to add to a daily routine.

How to use

Apply a thin ribbon to a toothbrush and brush onto the teeth for at least one minute, once daily, preferably at bedtime — after brushing with your regular toothpaste, or as directed by your dentist. Spit out — do not swallow — and avoid eating, drinking, or rinsing for 30 minutes so the fluoride stays on the teeth.

Who it's for

Adults at higher cavity risk who want prescription-strength fluoride in a gel they can brush on, including those with frequent decay, exposed root surfaces, orthodontic appliances, or sensitivity. Your dentist will confirm it's right for you through a brief telehealth review.

Related reading from Soothing Dental: non-invasive cavity prevention.

Frequently Asked Questions

How is the gel different from PreviDent 5000 toothpaste?

Both deliver the same prescription-strength 1.1% sodium fluoride (5000 ppm). The difference is format: this is a brush-on gel rather than a paste, which many people prefer for its texture or for applying a thin bedtime layer. Both are used once daily for extra cavity protection.

What flavors does it come in?

Fresh Mint and Very Berry. Choose whichever you’ll use consistently — the Berry option is popular with people who find mint too strong, and with families.

Do I need special trays to use it?

No. The gel is designed to brush on directly with a toothbrush — no custom trays required. (If your dentist has given you fluoride trays, it can be used in those too, but it’s not necessary.)

How do I use it?

Brush a thin ribbon onto your teeth for at least one minute, once daily, preferably at bedtime after your regular toothpaste. Spit out, and don’t eat, drink, or rinse for 30 minutes so the fluoride keeps working.

Do I need a prescription?

Yes — 1.1% sodium fluoride gel is a prescription product. Soothing Dental’s team reviews your eligibility through a brief telehealth screen, and a complimentary Rx review is included with your order.