According to a press release on jan23 2009 at CINCINNATI -
Crest White Strips introduced its latest innovation in tooth whitening technology: new Crest Whitestrips Advanced Seal. This ground-breaking training temporary adhesive forms on the teeth of the user, so they are easy to speak, and even drinking water for the bleaching comfortable anywhere, anytime. Secure attachment is clean after the bleaching, no mess behind. Achieving beautiful, whiter smile is now easier than ever before.


What are the benefits

These new strips provide three important benefits:
1st High-performance proved the same safe and effective teeth bleaching
ingredient that dentists use to remove surface stains and under

email;
2nd Better ties with immediate adhesion to teeth, allowing users to go
their daily lives, including talking, and even drinking water;
3rd No mess left behind by new, modern design. Crest
Whitestrips Advanced Seal is perfectly suited for each and every life
smile!


New Crest Whitestrips Advanced Seal Technology offers four unique layers
a thin, flexible strip of Crest Whitening provide dramatic and more
user experience:

(1) Special outer layer holds firmly to belt
teeth
(2) bleaching layer provides the same high performance Whitening
Ingredients Professionals
(3) The inner layer keeps eye whitening
tightly packed to the teeth, the gel prevents the spread to other areas
mouth
(4) last release provides a stable support belts for easy application. Crest Whitestrips Advanced Seal is designed to meet fungi and the shape of your teeth and is worn for 30 minutes per day for twoweeks, anytime, anywhere - even when talking and drinking!


read more here

http://www.reuters.com/article/pressRelease/idUS152809+23-Jan-2009+PRN20090123