The paint on tooth whiteners simply apply with a brush. The key to the brush on tooth whiteners working is keeping your teeth dry. The dryer your teeth are the better. This means no drinking, no eating, and you need to minimize the use of your mouth. Any saliva that gets on the tooth whitening solution will dissolve it and that makes it non effective. Some people have complained of blotching with the brush on tooth whiteners.

There are night time formulas that are used before bedtime when you are not using your mouth. These formulas tend to work the best. Mostly because you are less active when you are sleeping.

The paint on tooth whiteners typically use about 19% sodium per carbonate peroxide for the active ingredient.

Paint on tooth whiteners are useful for some folks and some say they are good for touch up on light stains.