How long can you leave 20% on???

I have no problem leaving it on 4-5 hours. I moved up to 20% after years of using the 15% overnight.

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ULTRADENT Opalescence 20% Teeth Whitening Refill Kit (4 Syringes) Carbamide Peroxide. Made by Ultradent, Unflavored. Tooth Whitening Refill Syringes - B-5402-2

ULTRADENT Opalescence 20% Teeth Whitening Refill Kit (4 Syringes) Carbamide Peroxide. Made by Ultradent, Unflavored. Tooth Whitening Refill Syringes - B-5402-2

Product ID: 478078082

Details

Active Ingredients
Carbamide
Brand
ULTRADENT
Item Form
Gel
Number of Items
4
Product Benefits
Teeth

⏳Up to 10 shades whiter in just 7 days

💎20% Carbamide Peroxide for pro-level whitening

🦷4 syringes with 1.2ml gel each, easy tray application

45252CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Brighten your smile, boost your confidence, and join 100 million glowing grins! 😁

HEALTH CONSCIOUS FORMULA - Vegan, gluten-free, kosher, and sweetened with xylitol to help reduce tooth decay risk while whitening.
FAST NOTICEABLE RESULTS - Whiten up to 10 shades in only one week with just 2-4 hours of daily wear—no LED lights needed.
TRUSTED BY EXPERTS MILLIONS - Backed by 30+ years of innovation, 50+ awards, and recommended by 25,000+ dental pros worldwide.
CUSTOMIZABLE COMFORTABLE FIT - Compatible with Invisalign, retainers, and custom trays for a seamless, mess-free whitening routine.
PROFESSIONAL GRADE WHITENING POWER - Experience dentist-recommended 20% carbamide peroxide strength for visibly brighter teeth at home.

Opalescence 20% Teeth Whitening Refill Kit delivers professional-level whitening with carbamide peroxide gel in 4 easy-to-use syringes. Designed for use with custom trays, it whitens teeth up to 10 shades in 7 days without the need for LED lights. The formula is vegan, gluten-free, kosher, and includes xylitol to support dental health. Trusted by dental professionals and millions of users, this refill kit offers a convenient, effective, and safe at-home whitening experience.

Specifications

ASIN	B00517M974
ASIN	B00517M974
Active Ingredients	Carbamide Peroxide
Age Range Description	Adult
Best Sellers Rank	#150,857 in Health & Household ( See Top 100 in Health & Household ) #140 in Teeth Whitening Kits
Brand Name	ULTRADENT
Customer Reviews	4.0 4.0 out of 5 stars (51)
Date First Available	November 24, 2011
Flavor	Unflavored
Global Trade Identification Number	00883205039651
Included Components	Syringe, Gel
Item Form	Gel
Item Weight	0.03 Kilograms
Item model number	5402
Manufacturer	Ultradent
Manufacturer	Ultradent
Manufacturer Part Number	5402
Material Features	Vegan, Gluten Free, Kosher
Material Type Free	Gluten Free
Model Number	5402
Number of Items	4
Package Dimensions	6.85 x 2.95 x 1.97 inches; 1.13 ounces
Product Benefits	Teeth Whitening Treatment
UPC	883205039651
Unit Count	4 Count

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45252CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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