Pros / The treatment only takes a day to complete.

Cons / The set lacks some necessary tools, like a shade guide and whitening pen.

 Verdict / This teeth whitening option is fast and comes with the support resources necessary for you to use the product correctly, but it lacks the lasting results of a superb teeth whitener.

Rembrandt Deeply White is a teeth whitener with a lot to offer you. It has a very short treatment period, only taking two hours of your time in one day to complete. The support services are also some of the best we’ve seen. While this set does have some shortcomings, it also has some of the best teeth whitening results you will find in any of the products we tested.

This Rembrandt option only takes two hours to make your teeth two shades whiter, and few teeth whitening kits have such a short treatment period. While its treatment time is impressive, it comes at the cost of short-term results. We found an almost immediate decrease in whiteness, and teeth looked less bright only a few days later.

This product’s gel is mild enough that it does not produce blisters or cause other discomfort to your gums. The product also contains sensitivity reducers that limit or eliminate the tooth tenderness often caused by this type of product. It does, however, have an unpleasant taste that lingers in your mouth after treatment. This is because of the two-hour treatment period, which does not allow for a chance to rinse or take a break that might help alleviate the poor taste.

Unfortunately, Rembrandt Deeply White sharply falls short with the tools included in the kit. The best teeth whitening kits have an array of tools to assist you in keeping your teeth as white as possible, but this one has hardly any. There is a moldable mouthpiece for your upper and lower teeth, but it lacks a whitening light, shade guide, applicators and whitening pen.

One of the best parts of this kit is the help and support services the company provides. Rembrandt has both a phone help line that is open during business hours and an email address with a reply rate of two days. There is also a detailed FAQs section on the manufacturer’s site composed of customers’ inquiries. The company is on social media, with Facebook and Twitter accounts. The kit comes with instructions for the set, and the website provides a copy of those instructions on the product’s page.

Rembrandt Deeply White Visit Site
  • Percentage Change in Whiteness
  • Days of Treatment
  • Number of Comforts
  • Number of Tools
  1. How much the teeth whitener improved the participant’s teeth on a scale of whiteness from 1 to 10.
    More is better.
  2. 4  Rembrandt
    20.0 %
  3. 20.0 %
  4. 20.0 %
  5. 20.0 %
  6. Category Average
    15.0 %


Whatever its shortcomings, the Rembrandt Deeply White 2-hour teeth whitening kit still provides fast results. Even if the effects are short lived, this teeth whitening kit is still a worthwhile option for anyone who needs to quickly whiten their teeth.

Rembrandt Deeply White Visit Site

Specifications and Benchmarks

Help & Support

Social Media


Change in Whiteness
Days of Treatment
Lasting Effect
Snug Fit


Blister Free
Sensitivity Reducers
Pleasant Taste
Discomfort Free


Whitening Light
Whitening Pen
Shade Guide
Syringes or Applicators
Bottom Mouthpiece
Moldable Mouthpieces