22% Pro Teeth Whitening Gel Refills Carbamide Peroxide Professional Dental-Grade for Trays - Made in USA. Peróxido de carbamida whitening Gel Retainer whitening Gel

I used this gel as directed and wiped excess off after application. Still the gel burned my tongue and inside of my cheek to the degree that painful ulcers resulted. I returned the remaining syringes with caution to future users.

This whitener is runny and gushes out of my tray. Tastes icky. I had the Phillips Zoom before. I won't order this again.