Pola Office one patient kit is a hydrogen peroxide based in-office tooth whitening system requiring minimal chair time. It is a neutral pH gel and contains desensitizers to maximize patient comfort. Built in desensitizer Pola Office contains potassium nitrate(densensitizing agent). It acts on the nerve endings by blocking the transmission of sensitive nerve impulses and providing a calming effect. No bleaching light required No light is required to accomplish effective results, however any heat emitting curing light will accelerate the bleaching process to achieve results in just 30 minutes. Flexible gingival barrier Pola Office? flexible gingival barrier allows for a quick and clean removal. INDICATIONS: 1. Whitening of discoloured vital teeth. 2. Whitening of discoloured non-vital teeth