Zoom has only 6% hydrogen peroxide while Day White comes in both a 7.5% and 9.5%. Surely that means that Day White is stronger?
The Zoom 6% Weekender kit is a 6% hydrogen peroxide formula but unlike Day White it is worn overnight. The hydrogen peroxide works over a longer period of time because there is a unique time release active matrix built in that controls the release of the hydrogen peroxide. Zoom also contains a surfactant, which lowers surface tension allowing more intimate contact between the bleaching agent and the tooth surface. Because of this there is an associated increase in tooth sensitivity. Zoom weekender is worn for only 3 nights. If you want something stronger then Day White & Nite White and you do NOT have tooth sensitivity or suffer from post-bleaching sensitivity or if you need to have whiter teeth for a social deadline then Zoom Weekender might be your fastest route.