StainGuard: Post whitening stain protection. Protects against stains. Seals teeth between treatments. Dentist recommended ingredients. New! Now with plasdone - A breakthrough polymer! Ingredient used by dentists. Comfortable double sided mouth tray for full coverage whitening. Provides full coverage whitening even in hard to reach areas. Reusable. 5 Minute (Starts to Whiten in 5 Minutes) Speed Whitening Gel: Begins whitening on first application. Removes old built up stains fast: tobacco; coffee; tea; wine. StainGuard Post Whitening Stain Protection Rinse: Now featuring plasdone, a specialized polymer, that coats teeth with a protective stain fighting shield. Locks in whiter teeth by keeping new stains from forming. Comfortable Mouth Tray: Reusable mouth tray ensures complete coverage of each tooth with plus whitening gel. One mouth tray.