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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Opalescence 20% Teeth Whitening Gel Refill Syringes, with PF (4ct) 5402-2 | 20% Carbamide Peroxide with Potassium Fluoride Mint Whitening Gel for Custom Trays. Low-Sensitivity Formula. Made in the USA

Product ID: 478078082

Details

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

💎20% Carbamide Peroxide - Pro-level whitening

🦷Potassium Fluoride - Sensitivity relief & enamel care

✈️Compact 4-pack syringes - Travel-friendly & mess-free

$71.86

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Brighten your smile, boost your confidence — no compromises needed! 🦷

NO FUSS NO LED LIGHTS - Professional-grade gel in easy-to-use syringes—no bulky devices or custom trays needed.
ULTRA FIT COMPATIBILITY - Works seamlessly with Invisalign, retainers, and custom trays for molar-to-molar coverage.
CLEAN CONSCIOUS CHOICE - Vegan, gluten-free, kosher, and made in the USA with over 30 years of dental expertise.
GENTLE ON SENSITIVE TEETH - Potassium fluoride and low-sensitivity formula ensure comfort without compromising results.
AWARD WINNING WHITENING POWER - Whiten up to 10 shades in just 7 days with a trusted formula backed by 50+ industry awards.

Opalescence 20% Teeth Whitening Gel Refill Syringes deliver professional-level whitening with 20% carbamide peroxide and potassium fluoride for sensitivity relief. Designed for use with custom trays, this low-sensitivity, mint-flavored gel whitens teeth up to 10 shades in 7 days. Made in the USA, vegan, gluten-free, and kosher certified, it offers a mess-free, travel-friendly solution trusted by over 25,000 dental professionals and backed by 30+ years of whitening expertise.

Specifications

ASIN	B00517M974
ASIN	B00517M974
Active Ingredients	Carbamide Peroxide
Age Range Description	Adult
Best Sellers Rank	#175,236 in Health & Household ( See Top 100 in Health & Household ) #161 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 kg
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 with Potassium Fluoride, Prefilled Trays, Professional-Strength Formula, Comfortable UltraFit Design, Even Gel Coverage, Molar-to-Molar Coverage, No LED Light Required, Mess-Free Application, Travel-Friendly, Mint Flavor, Backed by Extensive Whitening Research
UPC	883205039651
Unit Count	4 Count

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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