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You've never seen teeth whitening like this! The all-new Crest Whitening Emulsions is a breakthrough formula featuring a thin layer of 5x more active peroxide droplets suspended in a hydrating base to whiten teeth with virtually no sensitivity. This means it starts working instantly and stays on teeth 10X longer, with no need to rinse or brush off. Just squeeze onto the wand, apply on your teeth, and boost with with the LED Accelerator Light for even better teeth whitening results. Crest Whitening Emulsions is the best way to whiten. It removes stains, prevents new ones and leaves your teeth 100% whiter. vs ARC pen whitening