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 7 Days

💎20% Carbamide Peroxide Power

🦷4 Syringes for Multiple Treatments

€ 74.41

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

✨ Brighten your smile, boost your confidence! ✨

NO LED NEEDED NO FUSS - Sticky, viscous gel stays put for 2-4 hours daily—whiten smarter, not harder.
CUSTOMIZABLE COMPATIBLE - Works seamlessly with Invisalign, retainers, and custom trays—your whitening, your way.
LONG LASTING GENTLE FORMULA - 20% water content prevents dehydration while xylitol sweetening supports dental health.
PROFESSIONAL GRADE WHITENING AT HOME - Trusted by 25,000+ dental pros and backed by 50+ awards, get a dazzling smile without stepping into a clinic.
VEGAN GLUTEN FREE KOSHER CERTIFIED - Whiten with confidence knowing your product aligns with your values.

Opalescence 20% Teeth Whitening Refill Kit delivers professional-level whitening with 4 easy-to-use syringes of carbamide peroxide gel. Clinically proven to whiten teeth up to 10 shades in just 7 days, this vegan, gluten-free, and kosher-certified formula fits perfectly with Invisalign and custom trays—no LED light required. Trusted by over 25,000 dental professionals and backed by decades of expertise, it’s the ultimate at-home whitening experience for the modern millennial seeking a radiant smile.

Specifications

ASIN	B00517M974
ASIN	B00517M974
Active Ingredients	Carbamide Peroxide
Age Range Description	Adult
Best Sellers Rank	#196,617 in Health & Household ( See Top 100 in Health & Household ) #189 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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TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

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Good experience, but the tracking updates could be better.

2 months ago

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€ 74.41

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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