For use with custom trays created by your dentist

Don't have a dentist-provided tray?

Get Prefilled Whitening Trays

Whitening Gel Refills

4-Pack 1.2 ML Syringes

  • Non-abrasive ingredients that safely brighten your smile 
  • Three formula strengths to fit your preferred whitening routine
  • Sticky, viscous gel promotes sustained whitening 
  • Each syringe lasts for 2–3 uses

Strength Guide

Purchase Options

Free shipping on orders over $40

Why You'll Love It

Discover a better way to whiten with Opal Whitening Gel Refills—brought to you by the world’s #1-selling professional whitening brand, Opalescence®. Designed to pair with custom trays from your dentist, this product features non-abrasive ingredients that are safe on enamel and gums for fast, brilliant results.

We’re so confident you’ll love your smile after using our products that we even offer a 30-day satisfaction guarantee.

How To Use
  • STEP 1: Express one continuous bead of teeth whitening gel into trays, approximately ⅓ to ½ of the syringe per tray. 
  • STEP 2: Place teeth whitening trays over teeth. Gently press trays to move whitening gel into place. Remove excess teeth whitening gel from gums using a soft toothbrush.
  • STEP 3: Wear times vary based on the strength of the gel formula. Please see packaging for wear time. Afterwards, remove trays, rinse, and brush gel from teeth. Do not swallow rinsed gel. 
  • STEP 4: Clean teeth whitening trays (not included) with soft brush and warm water. Store trays in a clean, dry place.
Ingredients

15% Gel Refill Ingredients:
Glycerin, Water (Aqua), Carbamide Peroxide, Xylitol, Carbomer, PEG-6, Sodium Hydroxide, Mentha Piperita Oil, EDTA

20% Gel Refill Ingredients:
Glycerin, Water (Aqua), Carbamide Peroxide, Xylitol, Carbomer, PEG-6, Sodium Hydroxide, Mentha Piperita Oil, EDTA

35% Gel Refill Ingredients:
Glycerin, Water (Aqua), Carbamide Peroxide, Carbomer, PEG-6, Hydrogen Peroxide, Xylitol, Sodium Hydroxide, Mentha Piperita Oil, EDTA, Sucralose

Special Instructions
  • Store in a cool place.
  • Do not use if you have a known allergy or sensitivity to listed ingredients. If allergic reaction is observed, rinse exposed area thoroughly with water and consult your physician.
  • Routine dental examinations are recommended prior to use.
  • Pregnant or nursing women and users with serious health concerns should consult their health care provider prior to treatment.
  • Not recommended for use by children under twelve years of age.
  • Avoid whitening gel contact with any soft tissue, including eyes. If gel contacts soft tissue, rinse the contacted area immediately and seek medical assistance if needed.
  • Some users may experience temporary discomfort of the gums, lips, throat, tongue, or teeth. Use of Opal™ by Opalescence® Sensitivity Relief Toothpaste is recommended both before and after whitening. Should any of these symptoms persist or worsen after discontinuing use, contact your dentist. These side effects will usually subside within 1–3 days after discontinuing use.
  • Ingestion of small amounts of gel during use is expected. If large amounts of gel are ingested, drink large amounts of water and contact your healthcare provider. If gel is aspirated, seek immediate medical attention.
  • Do not eat, drink, smoke, or use tobacco products while whitening trays are in place.
  • Use only dentist-recommended trays with this product.
  • Stop whitening 7–10 days prior to any dental appointment. 
Sweetened with xylitol
Vegan
Whitens deep in enamel
Certified Gluten Free
Certified Kosher

Which gel refill strength is right for you?

15% Carbamide Peroxide

Best For

If you are concerned about sensitivity and want a treatment that gently whitens your teeth.

Treatment Time

4–6 hours

Sensitivity Considerations

Brush with Sensitivity Relief toothpaste to soothe sensitive teeth.

20% Carbamide Peroxide

Best For

If you have less sensitive teeth and gums and want a brighter smile in less time.

Treatment Time

2–4 hours

Sensitivity Considerations

Brush with Sensitivity Relief toothpaste to soothe sensitive teeth.

35% Carbamide Peroxide

Best For

If you have limited sensitivity and want faster, more brilliant results.

Treatment Time

30–60 minutes

Sensitivity Considerations

Consider lower concentration and brush with Sensitivity Relief toothpaste to soothe sensitive teeth.

What is carbamide peroxide?

A mixture of hydrogen peroxide and a compound called carbamide, carbamide peroxide is an oxidizing agent that removes tough stains. But though hydrogen peroxide breaks down faster, carbamide peroxide continues working, even after you’ve finished your treatment. 

From the dentist’s chair to the comfort of home.

  1. 1.

    Start with the custom whitening trays provided by your dentist.

    Don’t have a dentist-provided tray? 
Try our Prefilled Whitening Trays

  2. 2.

    Continue your treatment at home with Whitening Gel Refill Syringes.

  3. 3.

    Complete your whitening routine with OpalTM  Whitening Toothpaste.

Better whitening. Better results.

Better whitening. Better results.

Discover a brighter smile when you use Opal™ Whitening Gel Refills with your dentist-provided trays. We’re so confident you’ll love your whitening results that we even offer a 30-Day Satisfaction Guarantee.

Frequently Asked Questions

Read All FAQ
I don’t have a custom tray! How can I get one?

Reach out to your dentist for a pre-whitening consultation to discuss having a custom tray made—or try our convenient Prefilled Whitening Trays.

Can I reuse my Opal Prefilled Whitening Trays with Whitening Gel Refills?

No. Opal Prefilled Whitening Trays are designed for one-time use. Once you’ve finished brightening your smile with your trays, go ahead and discard them.

Is this the same product that I get from my dentist?

No, Opal by Opalescence® Whitening Gel features a different formulation from the product you buy from your dentist.

Which whitening gel strength is right for me?

Take a look at our whitening gel strength chart to see which formula is right for you.

If you still have questions, we recommend visiting your dentist for a pre-whitening consultation to choose the professional option that best fits your needs.

Can I use this product with LED/UV lights for better results?

No. Current research shows that carbamide peroxide (the whitening agent used in Opal by Opalescence® teeth whitening gel) or hydrogen peroxide (the whitening agent used in Opal by Opalescence® pre-filled whitening trays) are effective in whitening teeth. Light activation adds no additional benefit.1 In fact, some research shows that using a light for whitening can be harmful to lips and gums.2

Can I use Opal teeth whitening products with crowns, veneers, fillings or other dental work?

Yes! It’s safe to use our teeth whitening products on both natural and unnatural tooth surfaces. Our unique formulations will not affect the color or shade of a crown, veneer, implant, filling or tooth restoration. But, you can use our products to whiten your natural teeth to better match your dental work.

If you are whitening your teeth before a bonding procedure, talk to your dentist. We recommend avoiding any whitening treatments for 7–10 days before a bonding procedure.3-5

Glowing reviews from people like you.

Everything you need for a brilliant smile.

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  1. Mondelli RF, Azevedo JF, Francisconi AC, Almeida CM, Ishikiriama SK. Comparative clinical study of the effectiveness of different dental bleaching methods - two year follow-up. J Appl Oral Sci. 2012;20(4):435–443. doi:10.1590/s1678-77572012000400008

  2. Bruzell EM, Johnsen B, Aalerud TN, Dahl JE, Christensen T. In vitro efficacy and risk for adverse effects of light-assisted tooth bleaching. Photochem Photobiol Sci. 2009;8(3):377–385. doi:10.1039/b813132e

  3. Da Silva Machado J, et al. The influence of time interval between bleaching and enamel bonding. J Esthet Restor Dent. 2007;19(2):111-8; discussion 119.

  4. Spyrides GM, et al. Effect of whitening agents on dentin bonding. J Esthet Dent. 2000;12(5):264-70.

  5. Unlu N, Cobankara FK, Ozer F. Effect of elapsed time following bleaching on the shear bond strength of composite resin to enamel. J Biomed Mater Res B Appl Biomater. 2008 Feb;84(2):363-8.