# Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes

Syringes: Opalescence 20% Carbamide Peroxide Teeth Whitening Gel is a syringe refill for use with whitening trays, aligners, retainers, or Invisalign trays. The listing says wear it for 2–4 hours daily and claims whitening of up to 10 shades in 7 days. Trays are not included.

- [Original product page](https://best-deals.pro/product/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [View offer](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Opalescence
- Model: 5370-U
- Category: Beauty & Health > Personal Care
- Price: 53.99 USD
- Previous price: 64.00 USD
- Discount: 16%
- Price checked: 2026-11-14T09:36:39.936Z
- Rating: 4.5 / 5
- Reviews: 5412

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listing describes the gel as sweetened with xylitol and gluten-free and kosher.
- The product is described as made in the USA by Ultradent Products.

## Pros

- Eight individual syringes allow measured gel application to compatible trays.
- The listing says no LED light is needed or recommended.
- Compatible with several types of trays and aligners, though none are included.

## Cons

- A suitable tray is needed for use and is not included.

## Specifications

### Formula and use
- Active ingredient strength: 20%
- Wear time: 2-4 Hours a day
- Compatible trays: Invisalign trays, aligners, retainers, and custom dental trays \(none included\)
- LED light: NO LED Light Needed or Recommended
### Contents and product details
- Syringe quantity and volume: 8x 1.2 ml Syringes
- Dimensions and listed weight: 6 x 3.5 x 1 inches; 1.2 ounces
- Model number: 5370-U
- Manufacturer: Ultradent

## Before you buy

- The listing claims whitening of up to 10 shades in 7 days, but results are not guaranteed. Customer feedback reports that the 2–4-hour wear period can feel lengthy and includes mixed reports of sensitivity and gum irritation. Check the product expiration date and condition on arrival, as some customers report receiving expired or dried-up gel. The title gives code 5196-4 while product details list model 5370-U, so confirm the selected item and model before ordering. The listing's compatibility claims do not confirm that every tray or aligner is suitable for every user.

## A good fit for

- Buyers who already have compatible trays or aligners and want syringe-applied whitening gel.
- People looking for a 20% carbamide peroxide formula with a stated 2–4-hour daily wear time.

## Less suited to

- Buyers who need trays included or cannot accommodate several hours of daily wear.
- People seeking a whitening product that avoids possible sensitivity or gum irritation.

## Customer feedback

Customer feedback describes the gel as easy to use and effective for whitening, with some reports of visible change after two nights. Experiences with sensitivity and gum irritation vary, and the stated 2–4-hour wear time is a concern for some. Reports of expired or dried-up product make checking the date and condition especially relevant. These are customer perceptions, not guarantees of results or evidence that every package has the reported issues.
- Positive themes: Customers report noticeable whitening and ease of use.
- Negative themes: Some customers report receiving expired or dried-up product.
- Mixed feedback: Reports about tooth sensitivity and gum irritation vary, from little discomfort to burning sensations.
- Mixed feedback: Some customers consider the 2–4-hour application time lengthy.

## Frequently asked questions

### Are whitening trays included?
No. The listing describes this as a gel refill and says compatible trays are not included.
### How long should the gel be worn?
The listing specifies 2–4 hours a day. Follow the product instructions for use.
### Does it require an LED light?
The listing says an LED light is not needed or recommended.
### How many syringes are listed?
The listing states that the refill pack includes 8 syringes, each 1.2 ml.

## Alternative options

- [Opalescence 10% Teeth Whitening Gel Refill Syringes, \(4CT\) Melon 5395-2 \| 10% Carbamide Peroxide Melon Whitening Gel for Custom Trays. Low-Sensitivity Formula, Dentist Developed and Made in USA.](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence Go 15% Mint - Prefilled Teeth Whitening Trays - 5194 \| Hydrogen Peroxide Formula \(10 Treatments\) - Fast Results - Dentist Developed - Low Sensitivity - Gentle on Enamel - Mint](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Auraglow 44% Teeth Whitening Gel for Trays, Retainers & Aligners – Dentist Strength Carbamide Peroxide Whitener, 30 Treatments, 3 Syringes \(5mL\)](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence Go 15 Teeth Whitening Trays \(7ct\) + Sensitive Toothpaste 6822TS \| Hydrogen Peroxide Prefilled Tooth Bleaching Trays + Travel Whitening Sensitivity Toothpaste 1 Oz - Includes Tongue Cleaner](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence GO 15 Teeth Whitening Trays - Hydrogen Peroxide - 5194-T \| Gel Prefilled Trays \(10 Treatments\) Dentist Developed. Teeth Whitening Kit -Mint - Enamel Gentle - Includes 2Chill Toothbrush](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Smileactives Teeth Whitening Kit with Gel & Pen, Hydrogen Peroxide, 30-Day \| Complete At-Home System, Fast & Easy, No Strips, Lights, or Trays Needed](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Teeth Whitening U-Wraps - 15% Hydrogen Peroxide & Nano-Hydroxyapatite - Enamel Safe...](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence GO 15 Mint Whitening Bundle \(7 Treatments\) & Toothpaste 6238 \| Hydrogen Peroxide Gel Prefilled Teeth Whitening Trays & Travel Whitening Original Toothpaste 1 Oz. By Ultradent](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Teeth Whitening Powder - Breath Freshening Whitening Powder - Removes Stains 15g](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [EZGO 10 Pack Teeth Whitening Gel Refills 22% Bleaching Gel, No Sensitive Teeth Whitener, Great for Sensitive Tooth Whitening, Carbamide Peroxide Teeth Whitening Gel, Mint Flavor \(10X 3ML\)](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence Go 15 Prefilled Teeth Whitening Trays \(7qt\) & Toothpaste 6238TS \| Hydrogen Peroxide Gel Prefilled Teeth Whitening Trays Ultrafit 15% & Travel Whitening Original Toothpaste 1 Oz. By Ultradent.](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)

## Add-ons

- [Opalescence 35% Teeth Whitening Gel Refill Syringes \(4ct\) -5197-2 \| 35% Carbamide Peroxide Whitening Gel for Custom Trays. Low-Sensitivity Formula, Mint, Dentist Developed Made in USA.](https://best-deals.pro/visit/opalescence-20-percent-carbamide-peroxide-whitening-gel-syringes)

## Images

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 1](https://best-deals.pro/i/Slythkbn2p1KfdwMSVeCm9rpV5zX_7RhY2r5lmkwQJ8zuQLaviy_RnBbqjVr4d97yToLbtjeYkCbFfM5PhZKcoTdUUI3mozimVP5r7_dfdk1dXXv71xTQS-q.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 2](https://best-deals.pro/i/m6iYFcj-re19VLPVuwvOFUwoas_aqEnxE198K3RGEOvtJqDVrt9FCF-OwqL60QAKNC2oO4r9CH1jXfRbW0_Agjhr-BebOEwn2L1SrkPq7rVJ-v_6hSf7lr6G.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 3](https://best-deals.pro/i/qXWmzTlj8F64oVYXFT4zsND3RJ0E3CTsvfidKBVkDIFN8JQuEdEcvBKHNJY0p48YCzIr69BR8fuopMtO0-08wJuQD3XqFxWUa9uIvjX4mad9RbXP-eUn4PXV.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 4](https://best-deals.pro/i/bO5y5-3PrdPD0IN1HsmDd0okPOvesk54PnfrAQYGpbj0neyti9lhK9bvXeKz4NmhKMX1j94XDxPP6ZSFdEWPfR1Ow_yncEJ7caNfW7aGBEVMw-sazG4TxBLX.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 5](https://best-deals.pro/i/7fRSVa8DcZbTq3ydNN5ek9NCn4nXBkwGvU3w3kQqvBvSuleNETnjz2vUaDvhV5DLymH6ZW8I5l9It2qoURHiPE3QgnOxYU9tlZnmSssP0YNFDMYzYfWD1u1r.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 6](https://best-deals.pro/i/y2pK9GOTUPCw4ddH4664qt_Pq3kWytYTvBMcYZqlkPYmyc_JS3DjVkBCMb0jJ2LTLJmKvyUtaGP1Rs9T9HeaPr5Z2fV3bbnqcdUsuWqGxNWbTeoYDRiFoqyU.jpg)

![Opalescence 20% Carbamide Peroxide Whitening Gel, 8 Syringes — 7](https://best-deals.pro/i/YFbgi18TwhzFy8HUAAKPoRFM3cPIEQtPnwVPXm3wNrDX7QkO3WZC6W9Rsndc9UR0GVUVszh2vu6ltWMX82cKe8j_C0e_YwYzfGLB5d8FTd0X8T3ShRUVF896.jpg)