35% CP Mint - Gel Syringes Teeth Whitening - Refill Kit (4 Syringes Total) Carbamide Peroxide Gel. Made by Ultradent. Tooth Whitening Refill Syringes 5197-2

Does the job, and gives me a "boost" without having the optic white, chiclet look that one gets with using light.

This brand of teeth whitener is amazing. I have used this brand over ten years and it’s the only one I will use. Easy to use and keeps my teeth white.

I don't know , there are like 535 version of whitener available to buy - I have a hard time declaring which is the "best" but this does whiten nicely and more importantly doe not fry our gums or mouth...Happy with this product being used as the default in our house.

My son got his braces off and we went to the dentist to get trays. This is the formula they used. We now are on auto ship and buy them direct. He simply puts them in his trays and bam- white teeth. It works great!

I have custom made dental trays and started bleaching in the 1990's, using Philips Nite White Zoom. The results were amazing, but my dentist office switched to using Opalesence, so I ordered due to wearing it just a short while an hour or so, instead of overnight. So far I've used 2 syringes, this stuff is way more sticky gooey, perhaps it's old product, or stored in wrong temperature? Zoom was never thick like this, it went into the trays much easier. This is the first time I've used 35%, I use to use16 or 22% but so far I don't have sensitivity. I saw my dentist yesterday and he could see the difference in 2 weeks since I was last there. I like the mint flavor Opalescence offers. I have 2 more syringes to use and get about 2 applications out of each syringe. I'm only doing upper teeth so I can detect changes easily by comparing to bottom teeth. I wear it for about 1 hour of just over. I will update my review if there are more noticeable changes. Price for product was reasonable, and shipping was very fast.

I didn't read the instructions on this product. I thought I should wear my trays all night as I did using 15%. This morning, I woke up with a swore and slightly swollen upper lift. I should have read the instructions. and, wow, my teeth are so white. Thank you! and, I imagine, my upper lip will be ok.

Awesome product!!

I've purchased these at least 5 times now. What I didn't know at first, was that a little bit goes a long way. Only need to dab some on the trays - that are not included - to the top and bottom. Initially I was using half a syringe each time which is a bit of a waste. Coming from someone with very sensitive teeth, I couldn't even use crest strips when they first came out, these DID NOT HURT! I've noticed significant whitening when I use them. I only do this twice a week for about 30 minutes a day.