# Opalescence 20% Carbamide Peroxide Whitening Gel Syringes

Opalescence 20% Carbamide Peroxide Whitening Gel Syringes are a refill gel for use with compatible dental trays. The listing specifies 2–4 hours of daily wear and includes four 1.2 ml syringes, trays are not included.

- [Original product page](https://best-deals.pro/product/opalescence-20-carbamide-peroxide-whitening-gel-syringes)
- [View offer](https://best-deals.pro/visit/opalescence-20-carbamide-peroxide-whitening-gel-syringes)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Opalescence
- Model: 5400-US-4PK
- Category: Beauty & Health > Personal Care
- Price: 28.89 USD
- Previous price: 34.00 USD
- Discount: 15%
- Price checked: 2026-11-11T09:05:05.572Z
- Rating: 4.5 / 5
- Reviews: 5411

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

- Refill gel is supplied in syringes for delivery into compatible trays.
- Listing says no LED light is needed or recommended.
- The manufacturer claims whitening of up to 10 shades in 7 days, results are not independently verified.

## Pros

- Four syringes provide refill gel for repeated tray applications.
- The stated 2–4-hour wear window offers a defined daily-use range.
- Listing describes compatibility with Invisalign trays, aligners, retainers, and custom dental trays.

## Specifications

### Identity
- Brand: Ultradent
### Formula and use
- Active ingredient concentration: 20% Carbamide Peroxide
- Daily wear time: 2-4 Hours a day
- Syringe volume: 1.2 ml
### Dimensions and installation
- Dimensions listed: 4 x 4 x 6 inches; 1.2 ounces

## Before you buy

- The listing calls this a professional-level product for home use, follow the supplied directions and use only with a compatible tray. Trays are not included.
- Customer feedback reports mixed sensitivity and gum-irritation experiences, and some customers mention expired or dried-up product, check the expiration date and seal on arrival.

## A good fit for

- People seeking tray-applied whitening gel who already have a compatible tray.
- Buyers comfortable with the listed 2–4-hour daily wear period.

## Less suited to

- People who need a whitening kit with trays included.
- People seeking an LED-based whitening system, the listing says LED light is not needed or recommended.

## Customer feedback

Customer feedback describes noticeable whitening, including reports after two nights, and ease of use. Experiences with sensitivity and gum irritation vary, and the stated 2–4-hour wear time is a concern for some. Some customers also report expired or dried-up product. These comments are relevant to buyers weighing wear time and comfort, but do not establish a guaranteed result or the condition of any particular package. The aggregate rating is 4.5 out of 5 from 5,411 ratings, that overall figure does not explain individual outcomes.
- Positive themes: Customers report whitening effectiveness and ease of use.
- Negative themes: Some customer feedback reports expired or dried-up product.
- Mixed feedback: Customers report varied sensitivity and gum-irritation experiences.
- Mixed feedback: Opinions about the 2–4-hour application period are mixed.

## Frequently asked questions

### Are trays included?
No. The listing identifies compatible trays but says they are not included.
### How long is the gel worn each day?
The listing specifies 2–4 hours a day.
### Is an LED light required?
The listing says no LED light is needed or recommended.
### How many syringes are listed?
The listing describes four 1.2 ml syringes.

## 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-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. Lo](https://best-deals.pro/visit/opalescence-20-carbamide-peroxide-whitening-gel-syringes)
- [Opalescence Whitening Toothpaste Original 4.7oz - Mint - 2 Pack - 5166-2 \| Dentist-Developed Oral Care Whitening Fluoride Too](https://best-deals.pro/visit/opalescence-20-carbamide-peroxide-whitening-gel-syringes)

## Images

![Opalescence 20% Carbamide Peroxide Whitening Gel Syringes — 1](https://best-deals.pro/i/JTr4l6cG3GoZD0n3I60J88fHxD-iKdGETrglcqhYwHI20vePm9rGm9zZ2SZuiiTBOi-T5mzWXRS4Cewz0z5TUz9ZpYexJnV2P7JZFF6x2-KTXqa-xgDQp1mR.jpg)

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

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

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

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

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

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