Polanight tooth whitening system is a high viscosity, neutral pH take-home tooth whitening gel with a unique blend of soothers, conditioners and water content high enough to further reduce sensitivity. Tooth Whitening System - 22% Mini Kit - Take-Home, Carbamide Peroxide-Based, Spearmint Flavor. Mini Kit: 4 (1.3 g) syringes and 4 tips.