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 (2 Packs / 4 Syringes) Carbamide Peroxide. Made, Unflavored. Tooth Whitening Refill Syringes - B-5402-2

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

Product ID: 597930728

Details

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

⚡20% Carbamide Peroxide Power

🦷Up to 10 Shades Whiter in 7 Days

🛡️Potassium Fluoride for Sensitivity Relief

275.99 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Brighten your smile, boost your confidence, and never miss a moment! 🦷

NO LED OR FUSS REQUIRED - Mess-free gel syringes fit Invisalign, retainers, and custom trays—simplicity meets power.
FAST NOTICEABLE RESULTS - Whiten teeth up to 10 shades in just one week—because first impressions count.
GENTLE ON SENSITIVE TEETH - Formulated with potassium fluoride and xylitol to protect and soothe while whitening.
TRAVEL READY AWARD WINNING - Compact refill kit backed by 30+ years of expertise and 50+ industry awards.
PROFESSIONAL GRADE WHITENING AT HOME - Experience dentist-trusted results without leaving your couch.

ULTRADENT Opalescence 20% Teeth Whitening Refill Kit delivers professional-level whitening with 20% carbamide peroxide gel in four easy-to-use syringes. Designed for use with Invisalign, retainers, or custom trays, it whitens teeth up to 10 shades in 7 days while providing sensitivity relief through potassium fluoride and xylitol. Gluten-free, unflavored, and made in the USA, this award-winning formula is trusted by over 25,000 dental professionals and has brightened over 100 million smiles worldwide.

Specifications

ASIN	B00517M974
Active Ingredients	Carbamide Peroxide
Age Range Description	Adult
Best Sellers Rank	#23,701 in Health ( See Top 100 in Health ) #21 in Teeth Whitening Kits
Brand	ULTRADENT
Brand Name	ULTRADENT
Customer Reviews	3.9 out of 5 stars 47 Reviews
Flavor	Unflavored
Global Trade Identification Number	00883205039651
Included Components	Syringe, Gel
Item Form	Gel
Item Weight	0.03 Kilograms
Item form	Gel
Manufacturer	Ultradent
Manufacturer Part Number	5402
Material Features	Gluten Free
Material Type Free	Gluten Free
Material type free	Gluten Free
Model Number	5402
Number of Items	4
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
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 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 See more
UPC	883205039651
Unit Count	4.8 Milliliters

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