A post foaming oral care mousse is provided by the invention. The mousse includes at least a dentifrice composition and a compressed liquid propellant having a boiling point less than -10℃. The liquid propellant is blended into the mousse as an emulsion, and the emulsion is adapted to be dispensed from a container as a gel that foams after a time delay. The mousse has a viscosity of less than 30,000 centipoise when measured prior to the addition of the propellant. Preferably, the mousse expands at least 100 vol% in less than 5 seconds upon exposure to atmospheric pressure.本發明提供一種後起泡口腔護理慕斯。慕斯包括至少一種潔齒組成物及一種具有沸點低於-10℃之壓縮液體推進劑。液體推進劑被摻合於慕斯中成為乳液,而乳液適於以凝膠由一容器予以配送,其在一段時間延遲後起泡。當在推進劑添加前測量時,慕斯具有低於約30,000厘泊之黏度。較佳地,慕斯當曝露於常壓時,在少於5秒內膨脹至少100體積%。