Bulk Pack Take Home Whitening Gel. Combination of 14% Calcium Peroxide and 30% Carbamide Peroxide. Rebuilds enamel through significant calcium uptake. The ONLY teeth whitener with calcium peroxide that whitens with the additional benefit of strengthening the enamel by increasing re-mineralization and surface hardness. Bulk Pack: 36 - 4 ml Indivdually Packaged Dual Barrel Automix Syringes, Mixing Tips and 10 patient instructions.